Wastewater fears for urban farms

Rare pygmy hippos caught on film
Researchers capture pygmy hippos on film in Liberia, despite fears they had been wiped out.

Sudden oak death fears scotched
The devastating sudden oak death disease is not to blame for the demise of about 200 trees, say scientists.

Rare Bronze Age necklace is found
A rare amber necklace believed to be about 4,000 years old is uncovered in Stockport.

First inventory of life at poles
The first comprehensive inventory of the animals that live in a polar regions is completed, scientists report.

Britain 'needs deeper CO2 cuts'
More cuts in greenhouse gases by 2020 are needed if the UK is to play its part in combating climate change, an advisory body will say.