Earth Hour first started in Sydney Australia in 2007． Millions of people switched off their lights and electrical appliances for one hour． Since then， Earth Hour has got wide support around the world． On 31 March 2012， hundreds of millions of people in 152 countries and 6，895 towns and cities took part in Earth Hour．
Earth Hour shows that we care about our Earth， and that everyone has the power to change the world． But it is not about saving an Hour's electricity． It is about telling people to protect out Earth． It is not just for an hour a year， but every day．
A healthy Earth is not just good for animals and plants． It is also very important to all humans． We have now it is in danger． We must do our best to protect it．
Earth Hour is a chance for everyone to do a bit for our Earth． Join Earth Hour， and we can make a better world to live in．



Where did Earth Hour start in 2007？ ______

Where did hundreds of millions of people take part in Earth Hour？ ______

Who has the power to change the world？ ______

Is it about telling people to protect out Earth？ ______

Why must we do our best？ ______