Alex Kirby

Today sees the launch of ExtinctionRebellion, which describes itself as an international movement using mass civil disobedience to force governments to enter World War Two-level mobilisation mode, in response to climate breakdown and ecological crisis.

A significant threshold has been crossed by renewable energy as analysts report that the sectorʼs size last year reached double the level it was at just 10 years earlier.

The sheer scale of the fossil fuel reserves that will need to be left unexploited for decades if world leaders sign up to a radical climate agreement is revealed in a study by a team of British scientists.

As part of Planet Under Pressure, a BBC News series looking at some of the biggest environmental problems facing humanity, Alex Kirby explores the challenge of feeding the world without destroying the planet

The first problem with energy is that we are running short of traditional sources of supply.

The greenhouse effect could wreck attempts to lift the world’s poorest people out of poverty and reverse human progress, campaigners say.