The New York Times reports: For all their disputes, President Obama and Mitt Romney agree that the world is warming and that humans are at least partly to blame. It remains wholly unclear what either of them plans to do about it.

Even after a year of record-smashing temperatures, drought and Arctic ice melt, none of the moderators of the four general-election debates asked about climate change, nor did either of the candidates broach the topic.

Throughout the campaign, Mr. Obama and Mr. Romney have seemed most intent on trying to outdo each other as lovers of coal, oil and natural gas — the very fuels most responsible for rising levels of carbon dioxide in the atmosphere.

Mr. Obama has supported broad climate change legislation, financed extensive clean energy projects and pushed new regulations to reduce global warming emissions from cars and power plants. But neither he nor Mr. Romney has laid out during the campaign a legislative or regulatory program to address the fundamental questions arising from one of the most vexing economic, environmental, political and humanitarian issues to face the planet. Should the United States cut its greenhouse gas emissions, and, if so, how far and how fast? Should fossil fuels be more heavily taxed? Should any form of clean energy be subsidized, and for how long? Should the United States lead international mitigation efforts? Should the nation pour billions of new dollars into basic energy research? Is the climate system so fraught with uncertainty that the rational response is to do nothing?

Many scientists and policy experts say the lack of a serious discussion of climate change in the presidential contest represents a lost opportunity to engage the public and to signal to the rest of the world American intentions for dealing with what is, by definition, a global problem that requires global cooperation. [Continue reading…]