Very valid points ( except I personally can't give up eating meat). As a member of the US military I can attest to consumption of petroleum. Much of it boils down to lack of innovation because of the ease of using petroleum. The space race in the 50s and 60s sparked tons of innovation, but the fervor did not carry over to the automobile industry. We can put men in space running on batteries in the 60s, but we are just now figuring out how to do it for cars over 40 years later. Technology follows and mirrors the mentality of society. It is about convience, not requirements. Take me for example, I am posting this on my blackberry from work.
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