What are you doing for Earth Hour?

The World Wide Fund for Nature (WWF)'s Earth Hour takes place this year on Saturday 29 March. But what exactly is Earth Hour and what should you be doing about it? Here are the answers to all your questions. When did it begin?
A World Wide Fund for Nature (WWF) initiative, Earth Hour started in Sydney, Australia, in 2007 when 2.2 million households turned off their lights for one hour to make a stand against climate change. What’s this year’s campaign about?
This year WWF South Africa’...