At 26 years old, Steve Chingwaru uncovered 420 tonnes of gold in buried mining waste. Now everyone wants to hire him.
Drones are being used to replant degraded areas of forest in Brazil – how successful have they been so far?
Authorities say blaze in heart of Canadian tar sands region will be ‘subdued’ due to expected rain and cloud cover.
A community has watched generations of residents suffer from debilitating diseases. Could chemical exposure be to blame?