Argument: Developed states emit more; their steps have higher impact
"UN: Rich Nations Must Lead Fight Against Global Warming". eNews. November 27th 2007 - "The [UN] report criticized Washington for not imposing nationwide mandatory cuts on industrial emissions. [...] Stating the fact that the world's richest countries are also the biggest carbon emitters, the report said the US has to take the lead by cutting emissions by 80 per cent by 2050 in addition to contributing to a new 86-billion-dollar annual global fund to help poor countries adapt to climate change. [...] The report said the 19 million inhabitants in New York state have a higher carbon footprint than 766 million people living in 50 least developed countries." Therefore, developed countries are more obligated to cut emissions because such cuts will have such a higher bang for buck in solving climate change.