Slightly OT: Just got back from seeing An Inconvenient Truth. I thought it was very touching and well made, and quite convincing in bits, but still think that humans are not the major contributors to global warming. I think the Earth's cycles are like onions. Layers within layers, cycles within cycles. For instance, the meteor and possibly volcanoes that killed the dinosaurs threw up massive amounts of C02 and pollution.This had long lasty, deadly effects upon the environment and ecosystem. Also, recall the numerous mass extinctions throughout the history of this planet. Even 65000 years is not that long when you're planet is 5000000000 years old, orders of magnitude above the first figure. This current spike is like the dinosaur meteor and other mass extinctions, in that it marks the end of a current minicycle and begins a new one in the current megacycle, which will probably continue for the next billion years.
On Topic: Humans do overbreed cows to an extent, but as far as I can tell, there are no humans controlling volcanic activity, which makes about as much sense as trying to control earthquakes.
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