Coal phase-out is an environmental policy intended to stop burning coal in coal-fired power plants and elsewhere, and is part of fossil fuel phase-out. The health and environmental benefits of coal phase-out, such as limiting respiratory diseases and biodiversity loss, are greater than the cost. Coal is the most carbon-intensive fossil fuel, therefore phasing it out is critical to limiting climate change as laid out in the Paris Agreement. The International Energy Agency (IEA) estimates that coal is responsible for over 30% of the global average temperature increase above pre-industrial levels. Some countries in the Powering Past Coal Alliance have already stopped.
China and India burn a lot of coal. But the only significant funding for new plants is for coal power in China. Developed countries may part finance the phase out for developing countries through the Just Energy Transition Partnership, provided they do not build any more coal plants. It has been estimated that coal phase-out could benefit society by over 1% of GDP each year to the end of the 21st century, so economists have suggested a Coasean bargain in which already developed countries help finance the coal phase-out of still developing countries.