Amazing. Honestly if you believe it's man-made. The PROBLEM. too many people on this planet. One more person borne on this planet = another human adding to global warming concerns. Go ask China to clean up it's polluting factories and to do so increase their manufacturing costs which effects everyone who imports their goods.  If you believe the US can do more then the US is not to bear this problem alone as the US been trying unlike the unregulated Chinese. Go google China smog and see the pictures for yourselves! and STOP buying cheap Chinese goods as your supporting Chinese pollution.