The Great Barrier Reef used to be one of the natural wonders of the world, but as we were told about ten years ago, unless Australians gave up fossil fuels (or was it electricity?), the reef had bare months to survive. As we’re years past that inflexible deadline, we have to assume that the reef is now dead, dead, dead. Yet there are apparently still state or federal regulations in place to protect the (former) reef that Australian farmers are struggling against:
Our man in Tolga (north Queensland) has written to the local press on the absurd green tape tying up farmers.
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The ever-tightening regulatory stranglehold on farmers by governments “for the health of the Reef” (The Express, 21/8) is based on what Professor Peter Ridd has called “faulty science”.
Fertilisers are expensive and they aren’t used wastefully. They’re plant food; if the crops don’t consume them then the neighbouring vegetation, on land or in waterways, will – long before they get to the Reef.
If fertilisers were running off farms there’d be big green plumes leading downhill from them, easily visible on Google Earth. There aren’t. Likewise with herbicides and pesticides, there’d be big plumes of dead flora or fauna visible to drones. Again; there aren’t. It may have happened in the past, but these aren’t current problems.
Terrestrial silt run-off is a different matter to fertilisers and herbicides/pesticides. It has been pluming out from rivers since time began. The coastal reefs have always experienced it.
Just 15,000 years ago during the last ice-age the seas were 120 metres lower, the Reef’s current site was a coastal plain, and the Reef clung to the edge of the continental shelf. Everything that came out of the rivers washed over the whole Reef. And, yes, there was a lot of silt during the ice-age. CO2 was much lower due to the cooler seas (Henry’s Law), so plants were sparser. It was colder and drier so there was less rain to water what plants there were.
Aboriginal tribes were doing it tough, so they used firestick farming to get what small game there was. That left a lot of bare earth which blew as dust into valleys and was washed out to sea when the rains did come.
But it’s different now. Much of the main Reef area is 40 to 70 kilometres out to sea, and as Professor Ridd said, the prevailing south-easterly wind and currents keep terrestrial run-off much closer to shore. Professor Ridd also notes that more clean ocean water flows through the Reef each day than flows from our rivers each year.
Nonetheless, the mud-meme is being heavily promoted at present; “Earlier this year, a muddy plume of polluted water hit our Reef. It was so big you could see it from space.” Search the internet for “Muddy plume extends to Great Barrier Reef images from space” and there’s several alarmist websites (including “our” ABC) showing just one obviously-modified image.
