The Solar Impulse becomes the first aircraft to circle the globe powered by the sun after landing in Abu Dhabi on the last leg of its journey.
On World Mangrove Day, Sri Lanka's prime minister says mangroves' ability to swiftly absorb carbon make them vital in the fight to curb climate change.
The Sun-powered aircraft Solar Impulse sets out from Egypt's capital, Cairo, on the last leg of its quest to circle the globe.
Methane gas is twice as potent as carbon dioxide in warming the Earth's atmosphere
The disturbingly lifelike model shows how we need to evolve if we don't stop having car crashes – and has since taken on a life of its own on the internet
Plastic beads in facewash 'can even end up in the seafood on our plate,' says Greenpeace