| http://www.w3.org/ns/prov#value | - There is no such thing as cheap and clean energy, all we will ever have will be energy that is relatively cheap and clean corresponding to our technology level.-Oil looks cheap because we are using in a few centuries the production of millions of years.-Wind or solar energy comes free, but to use them, you need devides that need to be built, maintained and trashed, and due to their power source, t
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