Fossil fuels are a cheap and reliable way to produce energy. They work even when the sun isn’t shining and the wind isn’t blowing, and they’re very abundant—at least for now. So for countries with rising energy needs, it can be tempting to keep building fossil fuel plants despite their contribution to climate change.
This would be very harmful, says Noelle Selin, Associate Professor in the MIT Institute for Data, Systems, and Society. Even if we could just ignore climate change, fossil fuels come with many hidden costs. "A lot of fossil fuel plants have real detrimental effects on populations nearby, whether from the actual fossil fuel extraction, or because of air pollution,” says Selin. “Those costs aren't usually taken into account when people think about the potential risks or benefits for energy development, but they really should be."
The term “fossil fuel” refers to any source of energy made from fossilized plants or animals. This organic matter is compressed and heated over millions of years until it forms coal, oil, or natural gas. The reason these fuels contribute to global warming is that burning them releases carbon dioxide (CO2).