Levels of
public concern were lowest since 1992 in 12 countries, according to an
international poll
A worker clears rubbish from the Yellow river in Lanzhou in north-west China's Gansu province. Water quality along one third of China's Yellow river is now unusable because of pollution. Photographer:
A worker clears rubbish from the Yellow river in Lanzhou in north-west China's Gansu province. Water quality along one third of China's Yellow river is now unusable because of pollution. Photographer:













