Wonderful! Only 0.2% of global GDP. I can sign on to that. For the US, that comes to roughly $40 billion, give or take a few billion. And yet, the GOP routinely loses its marbles over subsidies on the order of $7 billion. How on earth would we get them to 40? Let's face it, the deniers in the world want to sit and do nothing and leave the problem for others to deal with - according to one recent quote, god will sort it out.