| http://www.w3.org/ns/prov#value | - a, Japan, Australia, and other nations would mean pouring up to 4 billion tons more carbon dioxide into the atmosphere by 2020 than the level needed to hold temperature increases to 2 C. That increased amount of CO2, coupled with significant levels of carbon dioxide emitted in later decades, would mean that atmospheric concentrations of CO2 could rise from the current 387 parts per million to roug
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