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Nathaniel: Gloomy tales http://weimar.edu/persuasive-essay-help/ research writing paper Carbon dioxide emissions can be reduced by building nuclear power stations, improving energy efficiency and by replacing a lot of coal by shale gas. But covering the world with wind turbines and solar panels is a pipe dream, because huge numbers of back-up fossil-fuel-fired power stations would have to be built to compensate for the unreliable electricity supplies generated by these sources.