The eletric energy of our country is not enough.Please list

The eletric energy of our country is not enough.Please list five good ways to save it
这是九年级下的英语作业本上的一道题目,至少要举例出5条.

1.Turn of the lights when you leave home.
2.Use the gas heaters instead of electricity ones.
3.Use the Day Light Saving time (夏令时)
4.Use other clean energy such as water power,wind power and solar power.
5.Turn of half of the street lamps of the city