Britain and Canada have launched a global coalition to end the use of uncoordinated coal.
So far, a total of 25 countries and regions have joined the Powering Past Coal Alliance. The alliance was announced at the UN COP23 climate conference to phase out coal-fired power by 2030.
Countries joining the coalition include Austria, Belgium, Costa Rica, Fiji, France, New Zealand, Ontario, Switzerland and Washington.
However, China, Germany, Russia and the United States did not participate in the world's largest coal-consuming countries.
Union members promised to set goals for the phase-out of coal, no longer invest in domestic and international coal power generation, and take practical action.
Members will work with businesses, civil society and government to provide technical and practical assistance to accelerate the transition away from coal.
Claire Perry, UK climate change minister, said: "Reducing global coal consumption should be the top priority in all countries and regions, where coal is the most polluting way of generating electricity.
"The coalition will show the world that the coal era is over and Britain is committed to completely phase out coal-fired power generation by 2025 and hopes to inspire others to follow suit," Perry said.