It is now six months since I reported on what even environmentalists are calling "the biggest environmental scandal in history". Indeed this is a scam so glaringly bizarre that even the UN and the EU have belatedly announced that they are thinking of taking steps to stop it. The essence of the scam is that a handful of Chinese and Indian firms are deliberately producing large quantities of an incredibly powerful "greenhouse gas" which we in the West - including UK taxpayers - then pay them billions of dollars to destroy.