Worse Than Fossil Fuel

Biodiesel enthusiasts have accidentally invented the most carbon-intensive fuel on earth

Over the past two years I have made an uncomfortable discovery. Like most environmentalists, I have been as blind to the constraints affecting our energy supply as my opponents have been to climate change. I now realise that I have entertained a belief in magic.

In 2003, the biologist Jeffrey Dukes calculated that the fossil fuels we burn in one year were made from organic matter “containing 44×10 to the 18 grams of carbon, which is more than 400 times the net primary productivity of the planet’s current biota.”(1) In plain English, this means that every year we use four centuries’ worth of plants and animals.

The idea that we can simply replace this fossil legacy – and the extraordinary power densities it gives us – with ambient energy is the stuff of science fiction. There is simply no substitute for cutting back. But substitutes are being sought everywhere. They are being promoted today at the climate talks in Montreal, by states – such as ours – which seek to avoid the hard decisions climate change demands. And at least one of them is worse than the fossil fuel burning it replaces.

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