Sustainability

Oil could run dry long before substitutes can take over

Gulf oil hits food chain much sooner than expected

Project aims to create living buildings

Climate change made ocean circulation switch direction

Humans emit two tons of CO2 a year – through eating

Shortage of alternative energy minerals will trigger trade wars

One fifth of animals could be set for extinction

World's biggest solar power project approved

Technique promises indefinitely storable solar energy

Arctic warming heralds colder US winters, warns NOAA