1. I think our main problem is the huge electricity expense induced by mining and its noxious effect on the climate. This is, to my mind, the only serious argument against Bitcoin.
Alleviating the electricity expense should be one of our priorities.
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1. Not even close. If you compare bitcoin mining to the electric consumption for the biggest malls in China you will be amazed how puny the numbers behind bitcoin mining are. If you're going to compare the pollution and add naval shipment in the equation you will find out that bitcoin is the LAST of our problems.
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1. If this is the case, still we need to make bitcoin green. To help the earth. Or are we, "they're bigger sue them first".
I agree with the usage of more greener electricity sources like wind, water, and sun. We should take part of the responsibility because we live on the same earth.