The use of coal is projected to decrease in several OECD countries due to self-imposed reductions in carbon emissions, according to a new report from the International Energy Agency. The power generation sector is expected to lead the way towards a decarbonized energy system.

Earlier this month, the International Energy Agency released the World Energy Outlook 2015. The report, which is the Agency's flagship publication, outlines the increasing role of natural gas and renewable energy for power generation.

For instance, the European Union enacted rules to reduce carbon emissions inducing the economies of its member nations to shift from carbon to renewable energy and natural gas. Member countries that don't implement the carbon emission plan face fines.

In the United States, the Environmental Protection Agency has introduced strict environmental requirements for coal production that increased the CAPEX of coal plants. Many coal plants currently used for electricity production will be decommissioned in the next five years and will be likely replaced by natural gas, solar, wind and geothermal powered plants.

In its 13th Five-Year Plan, which shall be released in 2016, China is expected to reduce its fossil fuel consumption in the future while increasing the use of renewable energy.

Electrical power is generated by fossil fuel combustion (coal or natural gas), nuclear reaction or kinetic energy from renewable sources such as solar, wind or water.

In the 2013 Annual Energy Outlook, the Energy Information Administration reported that natural gas is the second most cost-effective source of electrical generation, about 30% less than coal and 50% less than solar energy. Only geothermal energy costs less but the upfront extraction cost is more than 50% higher.

The IEA forecasts an increase in consumption of 50% for natural gas in the next 25 years.

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