| http://www.w3.org/ns/prov#value | - The scientific community is, he claims, still convinced of the reality of the greenhouse effect; he points to extreme weather events such as heat waves, droughts, wildfires etc. becoming more frequent and extreme; but he also refers to developments that were not yet on the horizon in 1989, such as unconventional fossil fuels (tar sands, shale gas etc.).
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