Global warming is caused by greenhouse gases like carbon dioxide and methane trapping heat in the Earth's atmosphere, causing temperatures to rise. This is similar to how a car heats up in the sun with the windows closed. Global warming is damaging the environment through rising sea levels, destroying forests, and causing acid rain. It threatens plants, animals, and people. To address it, people are carpooling, conserving energy at home, and governments are enacting laws like the Clean Air Act to reduce air pollution from industry.