earth hour

1.Earth hour is a goal to engage 1 billion people to turn off their lights for one hour as a vote to earth instead of global warming.2.It is held on 28 march.3.They are trying to stop global warming.4.They will switch off all their lights for one hour.5.We could use candles to light up our houses.6.Animal extinction.7.We could stop buying things made up of any parts of an animal so that poachers will lose hope in killing animals like tigers.