I loathe the sort of commentary stories like this generate. It’s all about how America contributes more greenhouse gasses than other countries. Okay, guilty as charged. It’s not like these greenhouse gasses don’t have a context. The American economy sustains the planet, pulls millions out of poverty, keeps the sea channels open, develops most of the medical breakthroughs, provides most of the funding for international institutions (including the finger-waggers at the UN’s environmental divisions), offers the best higher education to the world’s leaders, and generally provides a blanket of security for much of the planet. I could go on, but you get the point.