| http://www.w3.org/ns/prov#value | - At the same time the peak in traditional fossil fuels will have come (and according to some, gone).While various means of producing electricity and process heat, including space heating, will surely be non-biological, a reasonable estimate for a biofuel contribution is between 200 and 400 exajoules, depending upon the competing demands for land, water and other resources.
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