| http://www.w3.org/ns/prov#value | - Second, a proposition about the future: ???anthropogenic emissions of greenhouse gases will lead to significant global warming???, which is to be inferred from three subsidiary propositions: ???the carbon dioxide (CO2) concentration is rising???, ???the recent rise in CO2 is entirely anthropogenic???, ???carbon dioxide is a greenhouse gas; doubling its concentration will warm global climate in equ
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