1 Forecast on Energy Trends report by energy experts ExxonMobil. Despite advances in energy efficiency. But the increase in population and economic growth will result in demand. The overall energy of the spike. Demand for energy in all its forms is the increase in average annual rate of 0.9% from the year 2010 until 2040, biofuels will grow sharply as in 2040 these energy accounted for 4% of energy needs worldwide [1].