Watch: Singapore researchers are trying to give banana skins and coconut husks a new lease of life in water purification kits that can be used in disaster situations. They could one day also be used in the manufacture of batteries.
Do children ask the toughest questions? This World Oceans Day, we get renowned oceanographer Dr Sylvia Earle, founder of Mission Blue, to field questions from curious kids on the mysteries of the deep.
Our urban infrastructure is responsible for almost 40 per cent of global carbon emissions. Climate solutions need to include the biggest energy guzzlers, clean energy and retrofitting old buildings.