It probably surprises nobody to learn that coal produces more of the world’s electricity than any other fuel. But it may provide food for thought to realize that the second most widely-used fuels for power generation are now renewables.
Electricity generation from renewable sources has overtaken natural gas to become the second largest source of electricity worldwide, the International Energy Agency (IEA) has announced.
In Europe, the main renewables used to generate electricity are wind and solar power. Since 1990, global solar photovoltaic power has been increasing at an average growth rate of 44.6 percent a year and wind at 27.1 percent.
The IEA reports that electricity production last year in the 34 members of the Organization for Economic Co-operation and Development (OECD) fell slightly to 10,712 TWh (terawatt hours)—a decrease of 0.8 percent (86 TWh) compared with 2013. To put that in context, 1 TWh is 1 billion kilowatt hours and each KWh takes about 0.36 kilograms of coal to generate.
This decline, the agency says, was driven by lower fossil fuel and hydro production, which were only partially offset by increases in non-hydro renewables. These grew by 8.5 percent and nuclear energy by 0.9 percent.
In 2014, solar photovoltaic power overtook solid biofuels—used in power plants that burn biomass—to become the second-largest source of non-hydro renewable electricity in OECD countries of Europe, with a share of 17.3 percent.
The IEA says overall growth in electricity generation continues to be driven by non-OECD countries. Its latest statistics, which show world electricity generation increasing by 2.9 percent between 2012 and 2013, reveal two distinct trends.
Electricity generation is leveling off within the OECD, while it is rising strongly in the rest of the world. In 2011, non-OECD countries for the first time produced more electricity than members of the OECD.
Other milestones were reached in 2013, when global non-hydro renewable electricity exceeded oil-fired generation for the first time and renewable electricity overtook natural gas to become the world’s second largest source of electricity, producing 22 percent of the total.
In the same year, electricity generated by coal reached its highest level yet at 9,613 TWh, representing 41.1 percent of global electricity production. The growth in coal generation was driven by non-OECD countries.
Globally, more renewable energy is consumed in the residential, commercial and public services sectors than elsewhere, but there are two distinct patterns of use.
In non-OECD countries, only 22.3 percent of renewables are used for electricity and heat production and 60.7 percent in homes, commercial and public sectors. In OECD countries, more than half of the renewable primary energy supply (58.5 percent) is used for electricity and heat.
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