BBC

Drivers of older, more polluting vehicles will have to pay a fee to enter the centre of the city.

UK engineers developing a novel propulsion system say their technology has reached a new performance level.

New restrictions on drivers come into force in central London today, so how do these compare with the rest of the word?

Fine particles in the air have been linked to cancer, strokes, asthma, heart disease and possibly dementia.

An exhibition in Hertfordshire displays items for the first time since the mid-19th Century.

Secmol is an Indian school pioneering practical green education in one of the harshest environments.

Researchers from the University of Nottingham first spotted the tree in a Malaysian rainforest last August.

He taught himself to read from newspapers but went on to win a Nobel Prize.

Deadly flash floods in Iran kill dozens, and cause destruction across the country.

Scientists say natural events are driving the ice changes near Britain's Halley base in Antarctica.

Paddle boarder Lizzie Carr takes her plastic patrol to the waterways.

Researchers believe the four-metre-long mammal, found in Peru, was able to swim and walk on land.

For centuries, our lunar neighbour has been a source of fascination and inspiration for poets and artists.

"Sir David" was found swimming with a plastic flying ring stuck around its neck.

The Japanese Hayabusa-2 spacecraft is about to detonate an explosive charge on the asteroid it is exploring.

Australia's vast reef is struggling to re-grow corals after unprecedented bleaching, scientists say.

Scientists call for more research into the last time when atmospheric carbon dioxide levels were the same as today.

Christiana Figueres, who helped secure the Paris Climate Change Agreement, gives her suggestions.

New CO2 removal technology gains significant investment from fossil fuel companies, but greens have doubts.

A British Columbia-based company has shown that it can extract CO2 from the air in a cost-effective way.