The share of the world's electricity generated by coal is expected to fall to about 30 percent from approximately 40 percent in 2015 as the use of lower-emission energy sources including natural gas, nuclear and renewables increases says this report. 

[2]Global population growth of nearly 2 billion, a doubling of worldwide economic output and rapid expansion of the middle class in emerging economies are all expected to contribute to energy demand growth of about 25 percent from 2015 to 2040, according to ExxonMobil's 2017 Outlook for Energy: A View to 2040. Humanity's dual challenge is to meet growing energy demand while managing the risk of climate change. The Outlook for Energy can help people understand factors influencing future energy supply and demand and inform industries and governments as they consider future energy policy. Growth in global energy demand will be led by greater electrification of the global economy. Fifty-five percent of the energy demand growth over the next quarter century will be tied to power generation needed to support the increasingly digital and plugged-in lives of society, according to the Outlook for Energy, the company's annual long-range supply-and-demand energy forecast. Average electricity use per household will rise about 30 percent between 2015 and 2040. The share of the world's electricity generated by coal is expected to fall to about 30 percent from approximately 40 percent in 2015 as the use of lower-emission energy sources including natural gas, nuclear and renewables increases.