Major economies outside Japan Japan (50th) continues to be affected by the consequences of the Fukushima nuclear accident and in particular by the high costs of energy imports and increased CO2 emissions. Japan also demonstrates the challenges that nations can face from sudden supply disruption and the need for greater diversification in the power supply. The country’s CO2 emissions from electricity production have increased by 25% to 562 gCO2/kWh since 2008, while the share of alternatives and nuclear energy dropped from 17% in 2008 to 5% last year. Despite the introduction of aggressive feed-in tariffs for renewable energy in July 2012 (15), the contribution of renewable energy is still too limited to reverse this trend. Japan’s government is now seeking to restart some nuclear reactors to cut the nation’s dependence on imported energy. The largest among the fast-growing economies are pressed by the need to support ec
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