The Great Wall of China took part in this year's Earth Hour. Everyone around the world is asked to turn off lights for an hour from 8.30pm local time as a show of support for tougher action to confront climate change.
More top news
Parts of the UK will feel colder than the Arctic Circle in the coming week as bitter winds make it feel -15C in some places.
At least three people have been killed in clashes in eastern Ghouta just hours after the UN Security Council backed a 30-day ceasefire.
Very Very Cold !