4.What happened if we don’t turn off lights?

Step 3. learn the dialogue

　 Key words and expressions:

3.Why is it　 wasteful to throw away glass and paper?

2.What is a green school?

1.How did Zhao Ming feel when he read the　 article?

5.We should plant more trees, not to cut them down. It’s wasteful to throw away paper and metal

Step 2. listen and learn

1)listen to the tape and review the words

air 　electricity　 energy　 factory　 glass metal　 ocean　 paper

　pollution　 protect　 recycle　 throw away　

2) listen with purposes:

4.We should have a car pool to reduce air pollution.

3.We try our best not to use mobile phones.

2.We should collect the glass and paper and make them recycle.

1.We should save electricity and energy.

4.White rubbish are around us. It affects our health and destroy our soil.

2)What on earth should we do?