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Climate Gamble

It is highly unlikely the world can be powered by renewable energy sources alone by 2050. This is one of the conclusions of the IPCC’s often cited but rarely read Special Report on Renewable Energy Sources and Climate Change Mitigation, or SRREN.

Published in 2011, it reviewed 164 energy scenarios that focus on the role of renewable energy in the world energy supply. While the report finds that the maximum “technical potential” of renewable energy sources is indeed large, these scenarios – which attempted to take into account at least some economic and other practical limitations as well – found that their realizable potential is probably much less.

The above graph sums up the results. Not one of those 164 scenarios could deliver, in 2050, even the amount of energy used in the world in 2010. Even the most positive outlier, based on Greenpeace’s Energy [R]evolution study (which in turn…

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