Word: co2
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...farmland to grow animal feed. Livestock takes up a lot of space - nearly one-third of the earth's entire landmass. In Latin America, the FAO estimates that some 70% of former forest cover has been converted for grazing. Lost forest cover heats the planet, because trees absorb CO2 while they're alive - and when they're burned or cut down, the greenhouse gas is released back into the atmosphere...
...Then there's manure - all that animal waste generates nitrous oxide, a greenhouse gas that has 296 times the warming effect of CO2. And of course, there is cow flatulence: as cattle digest grass or grain, they produce methane gas, of which they expel up to 200 L a day. Given that there are 100 million cattle in the U.S. alone, and that methane has 23 times the warming impact of CO2, the gas adds...
...that we have it in for this particular technology," he says. "It's just that we don't see Sasol prospering in a world of carbon caps." One way to cut emissions is to capture the carbon dioxide. Davies says Sasol currently captures about 50% of the CO2 emitted during the conversion process and is experimenting with algae that absorb the gas, possibly allowing the company to raise that figure and introduce refinements of Fischer-Tropsch that will help it emit less. But for now, 50% of the CO2 will be released into the atmosphere, and there is still...
...mind-bendingly complex international negotiations, we need to have a plan in place by the start of 2010 to ensure that there isn't a fatal gap between the expiration of Kyoto and whatever comes next. (If a year or two should pass without a clear international cap on CO2 emissions, both government and industry might lose the incentive to invest in greener technology.) All of which puts a lot of pressure on little Copenhagen...
...kept our planet warm for billions of years - and is now, thanks to human activity, making us too warm. When we think of carbon, the first word we associate with it is emissions, a concept that evokes a tinge of illegality, as if emitting a mere molecule of CO2 were a crime. But as Eric Roston points out in his engaging new book, The Carbon Age: How Life's Core Element Has Become Civilization's Greatest Threat, C is about more than just CO2. "If you think about carbon only in terms of climate change, you're missing...