HOUSTON, July 24 (Xinhua) -- Energy consumption in China, India and African countries is projected to grow faster than the rest of the world through 2040, and changes in these economies have significant implications for the global energy markets, the U.S. Energy Information Administration (EIA) reported on Tuesday.

According to the International Energy Outlook 2018 (IEO2018), released on Tuesday by EIA, China, India and African countries, the most populated parts of the world, collectively consume about one-third of all global energy.

There are three reports in IEO2018 and in all China side cases considered, China's economy remains by far the world's largest producer of energy-intensive goods in 2040. Faster economic growth in China leads to higher energy consumption, but the amount it increases depends on how quickly China transitions from an export, investment-led economy to a more service-oriented, personal consumption-based economy.

India is projected to be the most populated country with the fastest-growing economy in the world under all three India side cases. However, Indian energy consumption levels do not reach those in China or the United States in the next two decades in any of India's side cases.

Higher economic growth across Africa leads to an expanding manufacturing sector and increasing industrial energy consumption because of possible regional competitive advantages. Higher assumed economic growth over the projection period leads to African energy consumption per capita that is 30 percent higher than in the Reference case in 2040.

China, India and Africa collectively accounted for 32 percent of global energy consumption in 2015, and in the IEO2018 Reference case, these regions are projected to account for 36 percent of global energy consumption in 2040.

IEO2018 builds on the Reference case presented in last year's outlook, IEO2017. The IEO2017 Reference case was updated with macroeconomic information, but no modeling changes were made to other end-use sectors.

This year's outlook offers a macroeconomic perspective regarding the uncertainty in economic growth in China, India and Africa. The side cases in IEO2018 increase annual average growth in real gross domestic product (GDP) between 2015 and 2040 to higher levels than in the IEO2018 Reference case.

To consider uncertainty related to economic structure, the composition of economic growth is also varied in the cases for India and China. EIA also generated an economic growth case where Africa's economy grows faster than in the IEO2018 Reference case.