Word: planetful
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...that good for you - there's a reason the city is home to the "Delhi cough" - and now scientists are discovering that the sooty air isn't good for the climate either. According to some estimates, black carbon may be responsible for as much as 18% of the planet's warming, making it the No. 2 contributor to climate change after carbon dioxide, which accounts for 40%. "The world could think that we just cut CO2 and the problem is solved and we all go home, but it's not," says Veerabhadran Ramanathan, a climatologist from the Scripps Institution...
Black carbon and CO2 each contribute to global warming in different ways. CO2 intensifies the greenhouse effect, allowing sunlight from space to enter through the atmosphere, then trapping the sun's energy as it bounces off the surface of the planet - like a greenhouse. (Of course, without some greenhouse warming, the earth would be a cold, dead place, but too much CO2 accelerates the effect and could make the earth too hot to be habitable. The temperature on Venus, for instance, where the atmosphere is 96% CO2, is over 400°C, or 750°F.) By contrast, black carbon...
Unlike CO2, which can hang around in the atmosphere for centuries - CO2 that was emitted by the first coal-powered train is probably still in the air, warming the planet - black carbon has a relatively brief life span. It remains just a few weeks in the air before it falls to earth. That's key, because if the world could reduce black carbon emissions soon, it could help blunt warming almost instantly. "You can wait a week or a month and the totals in the atmosphere can be significantly different," says Eric Wilcox, an atmospheric scientist with NASA. Meanwhile...
...Unless there is an "energy revolution," the planet will heat up by about 6°C by 2030 - about three times the rate of global warming that is considered manageable by most scientists. That, says the normally sober IEA, "would lead almost certainly to massive climatic change and irreparable damage to the planet...
...global recession has brought the first significant yearly drop in energy demand since 1981, giving the planet a rare breather from carbon emissions. But this is a "unique" moment, the report says, whose gains will be quickly obliterated without a significant move toward alternative energies. The impending energy crisis is "far greater than many people realize," it says. (Read "Russia and China: An Old Alliance Hinges on Energy...