One of the consequences of extra carbon dioxide output is that the planet has greened 15% since the dawn of the millennia and that most of that greening has taken place in what would have otherwise been semi-arid and rather denuded areas.” And so I don’t see a statistic on the anti carbon front that’s as powerful negatively as the statistic that the planet is 15% greener and that our crops are also in the consequence quite a lot more productive on the pro-carbon-dioxide front.”He added:“Why are we so sure that carbon dioxide output is a bad thing at all? I mean, some of the people who initially hypothesized about the greenhouse effect where quite a few said in their predictions that this would produce a greener, more lush and more productive world, a more habitable world. So is it unreasonable to put that forward as a proposition?