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Calm down, dear, it's only the environment. Every species pollutes its environment with its excretions and eventually, in a closed system, extinguishes itself. The only difference with homo sapiens is the speed with which we can do it, and the number of other species we will take with us. Actually there is another difference: like a very few others (wildebeeste and badgers spring to mind) we can limit our numbers to an indefinitely sustainable level. Interestingly, that level would offer a far better standard of living than most of us endure today. So why don't we? Politics and religion, apparently. There's no rational objection and no practical barrier.
science > technology > industry
Talk about biofuel, biofuel industry is so rife with conspiracy it is sickening. Fact is biofuel fuels NASA.They use the automobile fuel industry to drop their costs down to the essentially free petro market. They say nothing about what fuels their rockets -- I'd assume as not to disrupt the corn futures. But this is very a tightly held secret.US fuel ethanol provides essentially no fossil fuel usage benefit over straight petro. The amount of fossil fuels used during production has recently been determined to be greater than the energy output of the fuel ethanol industry, despite the biomass input to the system.SURPRISE! It's all a sham again!