Greenhouse gas emissions in the UK will be cut to almost zero by 2050, under the terms of a new government plan to tackle climate change.
Prime Minister Theresa May said there was a “moral duty to leave this world in a better condition than what we inherited”.
Cutting emissions would benefit public health and cut NHS costs, she said.
Britain is the first major nation to propose this target – and it has been widely praised by green groups.
But some say the phase-out is too late to protect the climate, and others fear that the task is impossible.