Critics say pledge to end use of dirtiest fuel source in 2030s and 40s does not go far enough

More than 40 countries have agreed to phase out their use of coal-fired power, the dirtiest fuel source, in a boost to UK hopes of a deal to “keep 1.5C alive”, from the Cop26 climate summit.

Major coal-using countries, including Canada, Poland, Ukraine and Vietnam, will phase out their use of coal for electricity generation, with the bigger economies doing so in the 2030s, and smaller economies doing so in the 2040s.

More than 20 governments and financial institutions, including the UK, US and Denmark, agreed to phase out overseas finance for all fossil fuels.

Research showed that the world could be on track to limit global heating to 1.9C, if commitments from India and other countries on greenhouse gas emissions are fulfilled.

Data seen by the Guardian revealed fossil fuel companies were using the energy charter treaty to sue governments for the losses they incur from national commitments to decarbonise.

Ireland was told it would need to cull 1.3m animals to meet climate targets.

The UK chancellor, Rishi Sunak, told the Cop26 conference London would become a global hub for net zero investment.