The energy on Earth is not in unlimited supply. Therefore, save energy is the most important thing you should do now. I have some solutions to resolve that problem.

First, Turn off the light when not necessary. you should turn off all electric devices such as fan, air-condition when leaving the room. 

Second, take a shower instead of a bath. Generally, taking a shower uses less water than a full bath. A standard showerhead flows at a rate of 2.5 gallons per minute. This means that a ten-minute shower only uses 25 gallons of water. A full bath can use up to 70 gallons of water.

Third, take a bus or ride a bike to school. Reducing the number of car trips per day is forward-thinking and sustainable. It not only reduces air pollution, eases congestion but also saves money on fuel costs.