Sustainability

Sun's role in warming Earth may be overestimated

Copenhagen climate accord won't do the job, say scientists

'Artificial leaves' produce electricity

Clean stoves could save millions in developing world

Ozone layer is recovering, says UN

Very Light Car carries off X Prize

Solar funnel makes PV cells more efficient

Sulphuric acid could cut global warming

Al Gore school stands on top of toxic ground

Ice caps melting far slower than believed