Why does Andy Murray want us to turn our lights off?
WWF global ambassador Andy Murray is urging us all to sign up for WWF's Earth Hour and turn off our lights between 8:30 p.m. and 9:30 p.m. on March 28.
Hundreds of millions of people across the world are doing just that to join forces in an incredible display of unity to focus on the environmental issues affecting our planet.
The tennis world number five is in Glasgow to compete in the Davis Cup against the U.S. this week and told his fellow Scots: "WWF's Earth Hour is a simple but powerful idea. It's a global moment to show we care about our brilliant planet, and want to protect the amazing people and wildlife that depend on it. Join me and millions of people around the world, by signing up to switch off on Saturday 28th March."
Director of WWF Scotland Lang Banks said: "It's brilliant to get the support of Andy Murray for our Earth Hour campaign. Andy became a global ambassador for WWF last year and we're delighted he's encouraging as many people as possible to join him by getting involved, and sending a clear message that people care about our planet and want to see action to protect it."
"2015 is an important year for the environment," Banks continued, "With world leaders meeting in Paris in December to agree action to reduce emissions and protect people threatened by climate change, while here in Scotland we're looking to ensure our climate targets are met. Earth Hour is a great way for people to get on board and say they want to see it celebrated and protected."
This is the ninth year of WWF's Earth Hour, which has become known as the world's largest call to action against climate change. Major landmarks will also be switching off their lights for 60 minutes on March 28, including Edinburgh, Stirling and Urquhart Castles, Glasgow's George Square and the Kelpies in Murray's home country.
So dig out the candles and get ready for an hour of darkness on March 28.
Check out the Earth Hour event tracker for more ways to get involved in your local area.