Global warming is a phenomenon caused by air pollutants, greenhouse gases, and carbon dioxide that trap heat in the atmosphere. Burning of fossil fuels, deforestation, and over farming are some of the major causes of global warming. The rising temperature is causing hotter waves, heavier rainfall, frequent droughts, and powerful hurricanes, which are negatively affecting the environment and human beings. To reduce the impact of global warming, it is important to become fossil fuel-free, protect the world's tropical forests, and generate electricity from renewable energy sources.