Energy makes things work. From coal and wood to gas and oil, planet Earth has a wealth of natural resources packed full of energy. The way that energy is produced and the amount we use have a huge impact upon the planet. If people continue to use fuels at the current rate, the Earth will run out of its own resources. The effect on the environment will be devastating. This way of living is called unsustainable. This fascinating book uses case studies to explore the causes and effects of human energy consumption and the ways in which people can reduce their impact on the environment by reducing their own energy consumption and using alternative renewable energy sources, such as solar power.