Every day, in homes all over the world, people leave lights on when no one is in the room.

Air conditioners are usually set at too low temperatures in summer.

A lot of water is wasted by using too much.

We'll have less and less gas to use because more people buy cars.

People, especially children, watch TV for too many hours.

A. Try our best to make friends with the countries in the Middle East and ask them to give us more gas in the future.

B. We should walk to work, ride a bike to school, and take a bus home more often instead of driving cars.

C. Encourage people to do more outdoor activities in their free time. Get children to learn more from reading books.

D. Plants more trees and grass around our houses. Ask people not to cut down the trees. Use your handkerchief instead of using paper napkins.

E. In rooms where you have an air conditioner, you can save electricity by cleaning the filter (滤波器). A filter uses 30% more energy when it is dirty. Also, set the air conditioner at 26 degrees.

F. Always keep the saying in mind "Turn off lights before leaving."

G. Take a shower instead of a bath, for a bath uses twice as much as water. Don't flush (冲洗) the toilet unnecessarily.