BBC

Demand is soaring for the metal cobalt, an essential ingredient in batteries and abundant on the seabed.

The daytime motorway limit will be cut to 100km/h (62 mph) in a bid to tackle a pollution crisis.

The 16-year-old climate activist will sail from the US to Madrid for the COP25 summit.

The winner of this year's competition has been crowned, and it looks a little painful.

Ranniel dives into one of Manila's most polluted rivers for less than two dollars a day.

Why has the huge amount of rainfall that hit South Yorkshire had such a large impact on people and property?

Plastic is building up in the areas of the ocean where fish feed and grow, according to research.

The Conservatives are accused of harbouring ambitions to revive fracking after the general election.

An inherited gene makes certain healthy foods taste exceptionally bitter and unpleasant, according to researchers.

Vaping caused a catastrophic reaction in Ewan Fisher's lungs that meant he could not breathe.

The US-China over artificial intelligence is heating up, but some warn the US could be over-reacting.

The most damaging tropical cyclones are three times more frequent now than they were 100 years ago.

A loss of snow and ice cover are the main reasons for the reduction of the Arctic's albedo effect, not soot as had been previously thought.

Astronomers are observing a rare event, a transit of the planet Mercury.

Land speed record holder Andy Green finally gets to drive the Bloodhound car across the Kalahari.

The rare hoiho becomes the first penguin to take the title, after two weeks of "memes and trash-talk".

Cutting the speed of ships by 20% can benefit health, protect whales and limit warming, say campaigners.

A British Airways insider says the industry deliberately fills planes with extra fuel to save costs.

The man behind a key amendment to a major climate treaty thinks that he has a way to cool the Earth.

Engineers think they understand why a heat sensor has been playing up on the superfast desert vehicle.