Quotulatiousness

January 15, 2016

QotD: The temptation to “shade” the truth toward the consensus

Filed under: Environment, Media, Quotations — Tags: , , — Nicholas @ 01:00

As I am fond of saying, it works like a stock market bubble. There is no need to posit a conspiracy. David Friedman’s view that this is a matter of a build up of many little lies rather than a few big ones is a more realistic as well as a more charitable picture of the mechanism at work.

I am yet more charitable than Professor Friedman. Though I completely agree with him that there are almost certainly many scientists shading their conclusions, it might well be the case that they are not doing so consciously at all. All it would take is for a lot of people with jobs to keep and mortgages to pay each to see which side their bread is buttered when the time comes round to apply for grants. As the American socialist author Upton Sinclair put it, “It is difficult to get a man to understand something, when his salary depends on his not understanding it.” On the unbuttered side of the bread, when a scientist observes that colleagues who raise doubts suffer for it, she would be acting much like the rest of humanity if she, while never aware of feeling fear, somehow finds herself more comfortable out of the intellectual proximity of these pariahs.

In a way the Rosetta scientists had it easy. All they had to do was hit a moving target half a billion kilometres away. Succeed or fail, there is no kidding yourself and no kidding others. Twenty-eight minutes later you and the world will know.

Natalie Solent, “Bubbles, lies, and buttered toast”, Samizdata, 2014-11-13.

December 11, 2015

Mark Steyn on the “decorum” of the US Senate

Filed under: Environment, Government, Humour — Tags: , — Nicholas @ 02:00

Mark Steyn writes about his appearance before the Senate sub-committee on Space, Science and Competitiveness:

On the morning of the event, Senator Bill Nelson, the Florida Democrat and Ranking Member, sent a message, warning me that I was obligated to “respect the decorum of the Senate”. I’ve been invited to Buckingham Palace, the White House and parliaments around the world, and nobody has ever felt it necessary to pre-issue such a warning. In the event, the US Senate has no “decorum” worthy of respect, as we’ll get to in a moment.

[…]

I said above that the Senate had no “decorum” to disrespect. By that I mean that, when my pal Ezra Levant and I gave evidence (as we say in the Westminster tradition) in the Canadian Parliament, members from all parties turned up and asked thoughtful and engaged questions. When we run into each other in Montreal, the representatives of the Bloc Québécois and I do not even agree on what country we’re in. But that afternoon we had a pleasant and civilized exchange, and one that had some rewardingly non-partisan after-glow in the months that followed.

In the US Senate, at least on Tuesday, senators wander in and out constantly. Their five-minute “question” sessions are generally four-minute prepared statements of generalized blather followed by a perfunctory softball to “their” witness, after which they leave the room without waiting to hear the answer – and then come back in when it’s their time to speak again at which point the staffer feeds them the four-minute blather they’re supposed to be sloughing off this time round. The video doesn’t capture the fakery of the event because under Senate rules the camera is generally just on whoever’s speaking. Whether this meets the “decorum” of the Senate, it certainly doesn’t meet the decorum of life; it’s a breach of the normal courtesies – and, frankly, Americans are the chumps of the planet for putting up with it. Since the 17th Amendment, senators have been citizen-legislators like any other, and so their contempt for the citizenry who have graciously consented, at their own time and expense to appear before them, demonstrates a profound misunderstanding of the relationship.

Take this guy Brian Schatz, the Senator from Hawaii. He did his shtick, lobbed a softball at his witness, Rear Admiral Titley, and stood up to leave. I said I’d like to respond, and he demurred on the grounds that he was outta there, he had to get back to washing his hair or whatever. I said I’d still like to respond to what he said, and so I did – to an empty chair. A pseudo-parliament is a fine place in which to debate pseudo-science, but “decorum” has nothing to do with it.

There is another kind of basic rudeness, which I have never experienced in a real parliament. If you’re moderating a panel discussion on C-SPAN with five panelists, it’s generally considered polite to distribute the questions broadly. In this case, the Democrats asked no questions of anyone other than their guy – Rear Admiral Titley. For example, there was some extensive discussion of the satellite record: They have the scientist who created and developed the satellite temperature record sitting at one end of the table: John Christy. This is a remarkable scientific accomplishment. Yet they directed all their questions on the subject to the bloke down the other end – Rear Admiral Titley, who knows no more about the satellite record than I do. This is like inviting Sir Isaac Newton to a hearing on gravity and then only asking questions of Mr Timeserver sitting next to him. It may represent the “decorum” of the Senate but in any other area of life it would be regarded as insufferably ill-mannered.

December 3, 2015

Even the IPCC agrees that corn ethanol is a waste of effort and resources

In Forbes, James Conca wraps up the latest IPCC Working Group reports’ comments on the viability of biofuel production from corn:

OK, can we please stop pretending biofuel made from corn is helping the planet and the environment? The United Nations Intergovernmental Panel on Climate Change released two of its Working Group reports at the end of last month (WGI and WGIII), and their short discussion of biofuels has ignited a fierce debate as to whether they’re of any environmental benefit at all.

The IPCC was quite diplomatic in its discussion, saying “Biofuels have direct, fuel‐cycle GHG emissions that are typically 30-90% lower than those for gasoline or diesel fuels. However, since for some biofuels indirect emissions — including from land use change — can lead to greater total emissions than when using petroleum products, policy support needs to be considered on a case by case basis” (IPCC 2014 Chapter 8).

The summary in the new report also states, “Increasing bioenergy crop cultivation poses risks to ecosystems and biodiversity” (WGIII).

The report lists many potential negative risks of development, such as direct conflicts between land for fuels and land for food, other land-use changes, water scarcity, loss of biodiversity and nitrogen pollution through the excessive use of fertilizers (Scientific American).

The International Institute for Sustainable Development was not so diplomatic, and estimates that the CO2 and climate benefits from replacing petroleum fuels with biofuels like ethanol are basically zero (IISD). They claim that it would be almost 100 times more effective, and much less costly, to significantly reduce vehicle emissions through more stringent standards, and to increase CAFE standards on all cars and light trucks to over 40 miles per gallon as was done in Japan just a few years ago.

October 9, 2015

Recalculating the impact of carbon dioxide in the climate models

Filed under: Environment, Science — Tags: , — Nicholas @ 04:00

A few people sent me a link to this article, which may be of interest to those following the ongoing climate debates:

It turns out the UN’s Intergovernmental Panel on Climate Change has over-estimated future global warming by as much as 10 times, [Dr David Evans] says.

“Yes, CO2 has an effect, but it’s about a fifth or tenth of what the IPCC says it is. CO2 is not driving the climate; it caused less than 20 per cent of the global warming in the last few decades”.

Dr Evans says his discovery “ought to change the world”.

“But the political obstacles are massive,” he said.

His discovery explains why none of the climate models used by the IPCC reflect the evidence of recorded temperatures. The models have failed to predict the pause in global warming which has been going on for 18 years and counting.

“The model architecture was wrong,” he says. “Carbon dioxide causes only minor warming. The climate is largely driven by factors outside our control.”

There is another problem with the original climate model, which has been around since 1896.

While climate scientists have been predicting since the 1990s that changes in temperature would follow changes in carbon dioxide, the records over the past half million years show that not to be the case.

So, the new improved climate model shows CO2 is not the culprit in recent global warming. But what is?

Dr Evans has a theory: solar activity. What he calls “albedo modulation”, the waxing and waning of reflected radiation from the Sun, is the likely cause of global warming.

He predicts global temperatures, which have plateaued, will begin to cool significantly, beginning between 2017 and 2021. The cooling will be about 0.3C in the 2020s. Some scientists have even forecast a mini ice age in the 2030s.

October 7, 2015

A Deeper Look at Tradeable Allowances

Filed under: Economics, Environment — Tags: , , , , — Nicholas @ 03:00

Published on 18 Mar 2015

Since the passage of the Clean Air Act, SO2 emissions have decreased by 35%. Part of this is due to tradable allowances, which created a market solution to the external costs of SO2 emissions. In this video, we look at the lessons of tradable allowances for SO2 and see if a similar market-based solution could work to decrease other pollutants, such as CO2.

July 24, 2015

The long-term damage to scientific credibility

Filed under: Health, Media, Politics, Science — Tags: , , , , , — Nicholas @ 02:00

Matt Ridley on the danger to all scientific fields when one field is willing to subordinate fact to political expediency:

For much of my life I have been a science writer. That means I eavesdrop on what’s going on in laboratories so I can tell interesting stories. It’s analogous to the way art critics write about art, but with a difference: we “science critics” rarely criticise. If we think a scientific paper is dumb, we just ignore it. There’s too much good stuff coming out of science to waste time knocking the bad stuff.

Sure, we occasionally take a swipe at pseudoscience — homeopathy, astrology, claims that genetically modified food causes cancer, and so on. But the great thing about science is that it’s self-correcting. The good drives out the bad, because experiments get replicated and hypotheses put to the test. So a really bad idea cannot survive long in science.

Or so I used to think. Now, thanks largely to climate science, I have changed my mind. It turns out bad ideas can persist in science for decades, and surrounded by myrmidons of furious defenders they can turn into intolerant dogmas.

This should have been obvious to me. Lysenkoism, a pseudo-biological theory that plants (and people) could be trained to change their heritable natures, helped starve millions and yet persisted for decades in the Soviet Union, reaching its zenith under Nikita Khrushchev. The theory that dietary fat causes obesity and heart disease, based on a couple of terrible studies in the 1950s, became unchallenged orthodoxy and is only now fading slowly.

What these two ideas have in common is that they had political support, which enabled them to monopolise debate. Scientists are just as prone as anybody else to “confirmation bias”, the tendency we all have to seek evidence that supports our favoured hypothesis and dismiss evidence that contradicts it—as if we were counsel for the defence. It’s tosh that scientists always try to disprove their own theories, as they sometimes claim, and nor should they. But they do try to disprove each other’s. Science has always been decentralised, so Professor Smith challenges Professor Jones’s claims, and that’s what keeps science honest.

What went wrong with Lysenko and dietary fat was that in each case a monopoly was established. Lysenko’s opponents were imprisoned or killed. Nina Teicholz’s book The Big Fat Surprise shows in devastating detail how opponents of Ancel Keys’s dietary fat hypothesis were starved of grants and frozen out of the debate by an intolerant consensus backed by vested interests, echoed and amplified by a docile press.

June 21, 2015

“… the carbon tax, like Paris, is worth a Mass”

Filed under: Environment, Politics, Religion — Tags: , , , — Nicholas @ 04:00

At National Review the editors’ response to the Pope’s encyclical on climate change is not warm:

There is an undeniable majesty to the papacy, one that is politically useful to the Left from time to time. The same Western liberals who abominate the Catholic Church as an atavistic relic of more superstitious times, who regard its teachings on abortion and contraception as inhumane and its teachings on sexuality as a hate crime today are celebrating Pope Francis’s global-warming encyclical, Laudato Si’, as a moral mandate for their cause. So much for that seamless garment.

It may be that the carbon tax, like Paris, is worth a Mass.

The main argument of the encyclical will be no surprise to those familiar with Pope Francis’s characteristic line of thought, which combines an admirable and proper concern for the condition of the world’s poor with a crude and backward understanding of economics and politics both. Any number of straw men go up in flames in this rhetorical auto-da-fé, as the pope frames his concern in tendentious economic terms: “By itself, the market cannot guarantee integral human development and social inclusion.” We are familiar with no free-market thinker, even the most extreme, who believes that “by itself, the market can guarantee integral human development.” There are any number of other players in social life — the family, civil society, the large and durable institution of which the pope is the chief executive — that contribute to human flourishing. The pope is here taking a side in a conflict that, so far as we can tell, does not exist.

March 30, 2015

QotD: Political beliefs and reality

Filed under: Environment, Politics, Quotations — Tags: , , — Nicholas @ 01:00

Political beliefs affect what one wants to be true. People are pretty good at persuading themselves that what they want to be true is true.

That works in both directions in the context of arguments about climate change. People who share my political views are suspicious of government regulation, CAGW (Catastrophic Anthropogenic Global Warming) provides an argument in favor of more government regulation and is used as such an argument at present, so we naturally want to look for arguments against CAGW.

On the other side, it’s my experience that people who think global warming is a terrible problem that must be dealt with are also, by some odd coincidence, people who think the things that need to be done to deal with it are things most of which ought to be done anyway, that the real cost is low or negative. They are likely to put that point in terms of creating a cleaner, more sustainable world. From their standpoint, CAGW provides arguments to persuade people to do things they want done, so they naturally want to look for arguments in favor of CAGW.

David D. Friedman, “Global Warming and Wishful Thinking”, Ideas, 2014-06-09.

February 5, 2015

QotD: “Can We All Shut Up About the Weather for a While?”

Filed under: Humour, Media, Quotations — Tags: , , , — Nicholas @ 01:00

Can we shut up about weather for a while, especially weather that is totally in keeping with the seasons in which it’s taking place? It’s only 2015, but it seems like we get storms of the century about every three to six months. Our parents famously walked three miles (uphill both ways, mind you) in sub-zero and scorching temperatures in shoes made of detergent-box cardboard while also mining coal and smoking unfiltered cigarettes by the carton. And here we are, snug in our all-wheel-drive vehicles and Gore-Tex weather wear, demanding work and school be canceled on a 40% likelihood of snow flurries.

Summer has heat waves, winter has snowstorms, get over it. Ever since The Weather Channel first went live in 1982, Americans have been in love with “weather porn,” those swirling animated displays of pixels that change from green to yellow to orange to red to blue while moving rightward across your TV, computer, or smartphone screens. We stand transfixed like 12-year-old boys looking at a centerfold for the first time as reporters dressed like the Gorton’s Fisherman stand in the rain and tell us… it’s raining. Or, worse yet, that it’s not raining, snowing, sleeting, or hailing.

Part of the weather hype is driven by hysteria over global warming, which means that weather — once delivered by genial weirdos like Willard Scott and David Letterman — is as big a deal as the latest American misadventure in the Middle East (for the record, I believe that climate change is taking place, that human activity is part of the cause, and that the best way to deal with it is to remediate its effects rather than simply pull the plug on human progress).

As one Twitter wag put it in response to the non-blizzard of the moment, “Remember: no snow = global warming, lots of snow = global warming, less snow than you thought = global warming.” The important thing being, of course, that we always feel bad about ourselves no matter what’s happening.

Nick Gillespie, “Can We All Shut Up About the Weather for a While?”, Time, 2015-01-27.

February 3, 2015

To some, it’s worse to be a “lukewarmer” than a full-blown “global warming denier”

Filed under: Environment, Media, Science — Tags: , , — Nicholas @ 04:00

Matt Ridley on the trouble with only agreeing somewhat with the “scientific” “consensus”:

I am a climate lukewarmer. That means I think recent global warming is real, mostly man-made and will continue but I no longer think it is likely to be dangerous and I think its slow and erratic progress so far is what we should expect in the future. That last year was the warmest yet, in some data sets, but only by a smidgen more than 2005, is precisely in line with such lukewarm thinking.

This view annoys some sceptics who think all climate change is natural or imaginary, but it is even more infuriating to most publicly funded scientists and politicians, who insist climate change is a big risk. My middle-of-the-road position is considered not just wrong, but disgraceful, shameful, verging on scandalous. I am subjected to torrents of online abuse for holding it, very little of it from sceptics.

I was even kept off the shortlist for a part-time, unpaid public-sector appointment in a field unrelated to climate because of having this view, or so the headhunter thought. In the climate debate, paying obeisance to climate scaremongering is about as mandatory for a public appointment, or public funding, as being a Protestant was in 18th-century England.

Kind friends send me news almost weekly of whole blog posts devoted to nothing but analysing my intellectual and personal inadequacies, always in relation to my views on climate. Writing about climate change is a small part of my life but, to judge by some of the stuff that gets written about me, writing about me is a large part of the life of some of the more obsessive climate commentators. It’s all a bit strange. Why is this debate so fractious?

Rather than attack my arguments, my critics like to attack my motives. I stand accused of “wanting” climate change to be mild because I support free markets or because I receive income indirectly from the mining of coal in Northumberland. Two surface coal mines (which I do not own), operating without subsidies, do indeed dig coal partly from land that I own. They pay me a fee, as I have repeatedly declared in speeches, books and articles.

October 31, 2014

Placebo effect so powerful that it can influence the climate

Filed under: Britain, Environment, Humour — Tags: , , , — Nicholas @ 07:34

JoNova on the newly discovered Global Placebo Effect:

Matt Ridley was questioning Baroness Sandip Verma at the House of Lords this week. He pointed out to the peers that even the IPCC admits there is “hiatus” that modelers can’t explain. Verma responded: “‘It [global warming] may have slowed down, but that is a good thing. It could well be that some of the measures we are taking today is helping that to occur.’” [Source — Dailymail]

Verma raises the intriguing possibility that windmills and solar panels that were built after 2005 have managed to keep global temperatures constant starting from ten years before they were constructed.

What’s even more remarkable is that none of these projects or activities have reduced global CO2 levels. It follows then, that the mere thought of building windmills is enough to change the weather.

Furthermore, it’s well known that more expensive placebo’s are more effective. Hence the final-final copy of the latest IPCC report — issued on Friday after the leak, the draft, and the redraft — will explain that they are 95% certain that if we spend $2 billion dollars a day on renewable energy (instead of just $1 billion) there will be no more category five storms, seas will stop rising, and goats will stop shrinking.

October 22, 2014

What would Milton Friedman do?

Filed under: Economics, Environment, Politics, Science — Tags: , , — Nicholas @ 07:20

David Friedman, who we can safely assume has a better sense of the late Milton Friedman’s thoughts and beliefs than most people, disagrees with a recent Forbes article asking WWMFD:

A recent Forbes article is headlined “What Would Milton Friedman Do About Climate Change? Tax Carbon.” It reports on a forum at the University of Chicago at which several economists, including Michael Greenstone, described as the “Milton Friedman Professor of Economics at the University of Chicago,” argued that Friedman would have supported a carbon tax. The evidence for that claim was a 1979 clip from the Phil Donahue show where Milton Friedman argued that if the government is going to do something about emissions, they should use an effluent tax rather than direct regulation. He does not actually say that government should do something about emissions, only that there is a case for doing so and, if it is done, the best way to do it is by a tax on emissions.

To get from there to the conclusion that he would have favored a carbon tax requires at least one further step, a reason to think that he would have believed that global warming due to CO2 emissions produced net negative externalities large enough to justify doing something about them. The problem with that claim is that warming can be expected to produce both negative externalities such as sea level rise and hotter summers and positive ones such as longer growing seasons and milder winters. The effects will be spread out over a long and uncertain future, making their size difficult to estimate. My own conclusion, defended in past posts here (one example), is that the uncertainties are large enough so that one cannot sign the sum, cannot say whether the net effect will be positive or negative.

I do not know if my father would have agreed but I have at least a little evidence on the subject, more than offered in the Forbes article. The same issue arose in the earlier controversy over population. Just as it is now routinely assumed that warming is bad, it was then routinely assumed that population increase was bad. Forty years ago I wrote a piece on the subject for the Population Council in which I attempted to estimate the externalities associated with population. I concluded that they were too uncertain for me to tell whether the net effect was good or bad. My father read the piece and commented on it. If he had disagreed he would have said so, and he did not. It is possible that he would have felt differently in the case of climate change, but I can see no reason to expect it.

September 4, 2014

The new absolutism

Filed under: Environment, Liberty, Media, Science — Tags: , , , — Nicholas @ 09:12

Brendan O’Neill on the rise of the absolutist mindset in science:

Who do you think said the following: “I always regret it when knowledge becomes controversial. It’s clearly a bad thing, for knowledge to be controversial.” A severe man of the cloth, perhaps, keen to erect a forcefield around his way of thinking? A censorious academic rankled when anyone criticises his work? Actually, it was Brian Cox, Britain’s best-known scientist and the BBC’s go-to guy for wide-eyed documentaries about space. Yes, terrifyingly, this nation’s most recognisable scientist thinks it is a bad thing when knowledge becomes the subject of controversy, which is the opposite of what every man of reason in modern times has said about knowledge.

Mr Cox made his comments in an interview with the Guardian. Discussing climate change, he accused “nonsensical sceptics” of playing politics with scientific fact. He helpfully pointed out what us non-scientific plebs are permitted to say about climate change. “You’re allowed to say, well I think we should do nothing. But what you’re not allowed to do is to claim there’s a better estimate of the way that the climate will change, other than the one that comes out of the computer models.” Well, we are allowed to say that, even if we’re completely wrong, because of a little thing called freedom of speech. Mr Cox admits that his decree about what people are allowed to say on climate change springs from an absolutist position. “The scientific view at the time is the best, there’s nothing you can do that’s better than that. So there’s an absolutism. It’s absolutely the best advice.”

It’s genuinely concerning to hear a scientist — who is meant to keep himself always open to the process of falsifiabilty — describe his position as absolutist, a word more commonly associated with intolerant religious leaders. But then comes Mr Cox’s real blow against full-on debate. “It’s clearly a bad thing, for knowledge to be controversial”, he says. This is shocking, and the opposite of the truth. For pretty much the entire Enlightenment, the reasoned believed that actually it was good — essential, in fact — for knowledge to be treated as controversial and open to the most stinging questioning.

July 29, 2014

Australia’s bitter experience with carbon mitigation

Filed under: Economics, Environment, Government — Tags: , , — Nicholas @ 06:47

Shikha Dalmia looks at Australia’s recently abandoned carbon tax scheme:

Environmentalists had a global meltdown last week after Australia scrapped its carbon tax. They denounced the move as “retrograde” and “environmental vandalism.”

They can fume all they want, but Australia’s action, combined with Europe’s floundering cap-and-trade program, signals that “mitigation” strategies — curbing greenhouse gases by putting economies on an energy diet — are not winning or workable.

Australia leapfrogged from being an environmental laggard (initially refusing to even sign the Kyoto Protocol) to a leader when its Green Party-backed Labor prime minister imposed a tax two years ago. It required Australia’s utilities and industries to pay $23 per ton of greenhouse gas emissions.

But the tax was an instant debacle.

Australia has the highest per capita carbon dioxide emission in the world and the main reason is that it’s even more coal-dependent than America. Coal supplies 75 percent of its energy needs (compared to 42 percent in America). But contrary to green expectations, the tax didn’t prompt companies to rush toward renewable sources, because they are far costlier.

Rather, utilities passed their costs to households — whose energy bills soared by 20 percent in the first year. Other industries that face hyper-competitive environment such as airlines suffered massive losses. (Virgin Australia alone reported $27 million in losses in just six months.) The tax also made Australian exports globally uncompetitive, deepening the country’s recession.

This spawned a backlash that brought down the Labor government and catapulted into office the Liberal Party’s Tony Abbott, who made a “blood promise” to ditch the tax, which he did promptly once elected, despite warnings that Aussie lowlands are more vulnerable to rising sea levels and other dire consequences of global warming than other countries.

July 7, 2014

The BBC losing its balance over climate reporting

Filed under: Britain, Environment, Media — Tags: , , — Nicholas @ 09:16

Matt Ridley on the BBC’s loss of balance:

The BBC’s behaviour grows ever more bizarre. Committed by charter to balanced reporting, it has now decided formally that it was wrong to allow balance in a debate between rival guesses about the future. In rebuking itself for having had the gall to interview Nigel Lawson on the Today programme about climate change earlier this year, it issued a statement containing this gem: “Lord Lawson’s views are not supported by the evidence from computer modelling and scientific research.”

The evidence from computer modelling? The phrase is an oxymoron. A model cannot, by definition, provide evidence: it can provide a prediction to test against real evidence. In the debate in question, Lord Lawson said two things: it was not possible to attribute last winter’s heavy rain to climate change with any certainty, and the global surface temperature has not warmed in the past 15 to 17 years. He was right about both, as his debate opponent, Sir Brian Hoskins, confirmed.

As for the models, here is what Dr Vicky Pope of the Met Office said in 2007 about what their models predicted: “By 2014, we’re predicting that we’ll be 0.3 degrees warmer than 2004. Now just to put that into context, the warming over the past century and a half has only been 0.7 degrees, globally … So 0.3 degrees, over the next ten years, is pretty significant … These are very strong statements about what will happen over the next ten years.”

In fact, global surface temperature, far from accelerating upwards, has cooled slightly in the ten years since 2004 on most measures. The Met Office model was out by a country mile. But the BBC thinks that it was wrong even to allow somebody to challenge the models, even somebody who has written a bestselling book on climate policy, held one of the highest offices of state and founded a think-tank devoted to climate change policy. The BBC regrets even staging a live debate between him and somebody who disagrees with him, in which he was robustly challenged by the excellent Justin Webb (of these pages).

And why, pray, does the BBC think this? Because it had a complaint from a man it coyly describes as a “low-energy expert”, Mr Chit Chong, who accused Lord Lawson of saying on the programme that climate change was “all a conspiracy”.

Lawson said nothing of the kind, as a transcript shows. Mr Chong’s own curriculum vitae boasts that he “has been active in the Green party for 25 years and was the first Green councillor to be elected in London”, and that he “has a draught-proofing and insulation business in Dorset and also works as an environmental consultant”.

So let’s recap. On the inaccurate word of an activist politician with a vested financial and party interest, the BBC has decided that henceforth nobody must be allowed to criticise predictions of the future on which costly policies are based.

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