The environmental impact of producing a loaf of bread has been analysed in depth - from the farm to the supermarket shelf.
One of UK's top scientists, Sir Paul Nurse, says experts are being "derided and pushed back".
The UN’s new climate chief says she is confident, despite concerns about President Trump's policies.
Is it possible to revive the woolly mammoth?
Fuelling the jet engine in a supersonic car
Once too precious to use, now too cheap to notice
How smartphones are helping to both catch and protect fish
Apollo 1 fire has had a far-reaching legacy
Tesla chief determined to engage with Trump White House
Stories from the natural world
Preview the new psychological thriller