Jeff Goodell

When it comes to climate and energy, Gates is a radical consumerist. In his view, energy consumption is good - it just needs to be clean energy.

Have we failed to slow global warming pollution in part because climate and environmental activists have been too polite and well behaved?

By burning fossil fuels, we are already dumping 30 billion tons of CO2 into the atmosphere every year, which has a profound effect on the climate. So, like it or not, we're already messing with a system we don't understand.

The first sign of whether Obama is serious about confronting the climate crisis will be revealed by how he organizes the White House.

Obama's record on climate issues is not all bad.

Once we start deliberately messing with the climate systems, we could inadvertently shift rainfall patterns (climate models have shown that rainfall in the Amazon might be particularly vulnerable), causing collapse of ecosystems, drought, famine, and more.

Americans don't pay much attention to environmental issues, because they aren't sexy. I mean, cleaning up coal plants and reining in outlaw frackers is hugely important work, but it doesn't get anybody's pulse racing.

Nobody disputes that cheap natural gas would be a good thing for the economy. The question is, is this a sustainable new development that can be counted on for decades to come, or simply a 'bubble' brought on by a land grab and drilling frenzy?

In recent years, America's wealthiest man has begun to tackle energy issues in a major way, investing millions in everything from high-capacity batteries to machines that can scrub carbon dioxide out of the air. With a personal fortune of $50 billion, Gates has the resources to give his favorite solutions a major boost.

New York City Mayor Michael Bloomberg, who also happens to be the 10th richest person in America, with a personal fortune of some $18 billion, likes to pick a fight - especially fights where the line between good and evil is particularly stark.