Consumption of electricity adversely affects the Earth's ecology. Therefore, the World Wildlife Fund (WWF) has decided to hold a rally in 2007 - Earth Hour. The purpose of the event - to draw attention to climate change on the planet. In Russia, this action took place in 2009. For 8 years, we acceded to more than 100 cities of the country. This year, March 25 I also will take part in the action - Earth Hour. In the following, I will try to follow the economical use of electricity at home. The school will tell friends about this event