Hydroelectric dams generate 40% of the world's renewable energy, the largest of any type. View this infographic to learn more.
The U.S. emits about 6 billion metric tons of greenhouse gases a year. Here's how these emissions rank by sector.
All energy sources have negative impacts, but some are better for the environment than others. Which energy source is the cleanest?
For the last 50 years, fossil fuels have dominated energy consumption. This chart looks at how the energy mix is changing in over 60+ countries.
