A program to increase electric vehicle adoption in California increased air pollution in lower-income communities and communities of color – groups that are less likely to own electric cars.
Researchers and start-ups are exploring a variety of ways of locking up carbon in the sea, from seaweed farming to fertilising the oceans with iron – but we know little about the implications.
High-rise cities on two or three reclaimed islands up to 6 metres above sea level could secure the long-term future of the Maldives in the face of climate change.
The UK government says a proposed new coal mine in Cumbria will have a "broadly neutral" effect on greenhouse gas emissions, but its climate change advisers disagree.
