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RE: Which clean, renewable energy should humans pursue most?
It has! When I was in college my physics prof was super anti-solar (and in favor of other renewables) because of the low yields. He predicted it would never be cost efficient. I follow him on facebook and he has very happily walked back his position over the past few years as solar capacity has exploded.
I can understand how he felt. You still need very large panels for larger yields, although if you have more wiggle room in the budget there are better quality panels and batteries available now.