Europe's urban areas are particularly vulnerable to invasive species as a result of high volumes of trade and more transport links, say experts.

The environment department Defra outlines its proposals on compensating for the loss of biodiversity through development.

Ghana dismisses accusations that oil operations could have caused the death of several whales washed up on beaches over the past week.

A laser-microscope could lead to more precise brain cancer surgery by clearly highlighting the edges of a tumour, US researchers say.

David Cameron says Britain has fresh evidence of chemical weapons use in Syria, as he arrives in Russia for the G20 summit of world leaders.