Sentences with phrase «cumulative global energy demand»
From 1990 to 2010, improvements in energy efficiency have reduced cumulative global energy demand by over 25 per cent.
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Even allowing for improved energy efficiency, if global energy demand continues to grow along the anticipated trajectory, by 2030 the investment over this period in energy - carrier and - conversion systems will be over 20 trillion (1012) US$, being around 10 % of world total investment or 1 % of cumulative global GDP (IEA, 2006b).