Unit 4 Planting trees is good for us 课件

课件13张PPT。Unit 4Planting trees is good for us.people cut down trees!砍伐Why do people cut down trees?Because ......Because we want more houses,roads and buildings.Farmers also need more land to grow rice and vegetables.But the weather is changing.change -- changing 变化
It's getting hotter.What can we do?We need to plant more trees.Trees help to make the air cool and fresh.Let's plant more trees to make the Earth clean and green.T or F.
1. We want more houses because there
are more people.
2.The earth is getting hotter and hotter.
3.People cut down trees to make more
roads.
4.Trees will help to make the earth
a better place.
5.Farmers need more land to grow rice
and vegetables.Goodbye!