1 We must protect the rainforest from people that cut down the trees.
2 There aren't many tigers left and they might disappear completely soon.
3 People should switch off their computers to save energy .
4 You can recycle all kinds of household waste.
5 If you can't swim well, you may drown.
6 People should reduce the amount of water they use.
7 All the ice at the North Pole will melt unless global warming stops.
8 The technician is planning to install an air conditioner.
9 You can join a charity like the WWF to help animals.
10 Giraffes have to raise their heads to reach leaves from tall trees
