Twenty-two of the world’s most polluted cities are in India, where deadly air plus COVID-19 is putting millions at risk.
Glaciers have shrunk at high speed over the last 30 years, raising fears of future land loss and more climate refugees.
As the US rejoins the Paris Agreement, rich nations fail to pay costs to help poorer countries adapt to climate change.
After a Trump presidency that belittled science, Joe Biden brings a new sense of urgency to tackling the climate crisis.