Despite the pandemic, atmospheric levels of CO2 and methane once more broke records last year.
From acid rain to the ozone hole: Can we learn from the environmental "success stories" of the past?
What's the evidence for global warming and how do we know it's being caused by human activity?
From 2025, physics, chemistry and biology will no longer be offered as separate GCSE subjects.
Cities are under threat from floods, forest fires and other disasters - how is tech helping with emergency responses?
The world's biggest oil exporter will cut carbon emissions, but not stop producing fossil fuels.
The climate activist speaks to the BBC about the COP26 conference, emissions targets and rickrolling.
Millions of tonnes of sand were shifted to part of the Norfolk coast - have they held back the sea?
Najin, 32, has been part of a programme in Kenya trying to save her species from extinction.
Government advisers express "deep concern" at planned reductions in aid spending before COP26.