Carbon dioxide – the gas scientists say is most responsible for global warming – has reached levels in our atmosphere not seen in 3 million years, scientists announced.

Elon Musk announced Thursday he had released all of the electric carmaker Tesla's patents, as part of an effort to fight climate change.

Pioneers are already making inroads into the market. But once economies of scale kick in...

The broadcaster had a powerful message to the Davos elite as he unveiled his new Netflix documentary Our Planet.

The EU has outlined an ambitious plan to slash greenhouse gas emissions, albeit one pegged to a 32-year timetable. The non-binding proposals go further than goals member states are already struggling to keep.