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I hear ya. The sustainability issues with modern agriculture are huge. Especially here in the west where irrigation water is imported into an area. The california Aquaduct transports several million acre feet of water from the sacramento river to the west side of the san joaquin valley and...

This is a excerpt from the carbon dioxide page on wikipedia. It's kind of hard for me to believe that a 5% addition by humans would make much difference. Carbon dioxide is released to the atmosphere by a variety of natural sources, and over 95% of total CO2 emissions would occur even if humans...