Figure 4
From: The production of renewable energy in the form of methane using electrolytic hydrogen generation
Change in recent energy consumption and future prospects of the world energy demand. The energy consumption over a recent period of 30 years [1] and future prospects of the world energy demand estimated under the assumption of a continued rise in the rate of energy consumption evaluated over the period from 1990 to 2010 and the anticipated years of exhaustion of world reserves of fossil fuels [1] and uranium [2].