1. - Non - renewable energy sources : fuel, coal, natural gas, ...
- Renewable energy sources : wind, hydro, solar, ....
2. I use oil the most.
3. We use energy for many things, such as: heating and cooling our homes, driving cars,...
4. - Use low energy light bulbs
- Turn off the lights when leaving a room or going to bed
- Use biogas for cooking at home
- Use natural light, using solar panels
- Limited use of electricity during peak hours