By Victoria Gill
Science correspondent, BBC News
A rare environment on Australia's Lord Howe Island has faced a complex battle for survival.
Seagrasses are great carbon sinks - said to be up to 35 times better than the rainforest. Can the underwater meadows being planted around the UK help us reach carbon zero?
By Stephen McGrath
Curtea de Arges, Romania
British scientist James Lovelock says population growth means something like the virus is "almost inevitable".
On land and underwater, animals use sound to communicate. This is against a rising tide of man-made noise. What happens if you can’t hear or be heard? Can anything be done?
By Roger Harrabin
BBC environment analyst
The underwater plant is key to reducing carbon dioxide, say the experts.
By Helen Briggs
Ecologists want to restore an area of land once referred to as the Alps of Glamorgan.
Acres of seagrass which 'takes 35 times more carbon dioxide from the air' than rainforests to be restored.
How we use our forests has evolved from timber and food production to recreation.