| http://www.w3.org/ns/prov#value | - concerns about climate? >> absolutely. and actually he is the point about energy mix. we have got to get it lighter in carbon. we do not have to get rid of all carbon. we have to get it lighter. >> lord brown, do you mean carbon or carbon dioxide? if you mean carbon dioxide, carbon is an element. it is black and it is sooty. are you talking about the gas carbon dioxide or carbon, just so i know? >> mo
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