There are many ways to save energy:

• Energy Saving Tips:
• Always turn off the lights when not in use
• Use natural daylight as much as possible
• Make sure all doors are closed tightly
• Don't leave doors open longer than it takes to get in or out
• Use the automatic setting on your thermostat
• Use alternative sources of heat some of the time
• Wear warm clothes and you can keep the thermostat lower
• Don't open the refrigerator door more than you need to
• Read books instead of watching TV or playing electronic games
• Don't leave computers, televisions or other appliances on when not in use
• Don't put furniture or large objects such as toys in front of radiators
• Cover the bottom of doors where air comes in with a rug or door guard
• Can you think of any more?

Lots more earth saving ideas.