Pearce: Three current issues suggest that the risks of myopic adherence to ideology over rational debate are real: genetically modified (GM) crops, nuclear power, and shale gas development. The conventional green position is that we should be opposed to all three. Yet the voices of those with genuine environmental credentials, but who take a different view, are being drowned out by sometimes abusive and irrational argument.
In each instance, the issue is not so much which side environmentalists should be on, but rather the mind-set behind those positions and the tactics adopted to make the case. The wider political danger is that by taking anti-scientific positions, environmentalists end up helping the anti-environmental sirens of the new right.