'''Green energy''' -- often a misnomer—consists of renewable energy sources such as solar cells and [[windmill|wind turbines]], which may cause more harm to the environment than traditional energy sources or nuclear energy. Sometimes green energy fails when it is particularly needed, as in windmills typically not working on the coldest days in northern areas. The weather is rarely predictable and relying on an unpredictable system for energy is risky at best. | '''Green energy''' -- often a misnomer—consists of renewable energy sources such as solar cells and [[windmill|wind turbines]], which may cause more harm to the environment than traditional energy sources or nuclear energy. Sometimes green energy fails when it is particularly needed, as in windmills typically not working on the coldest days in northern areas. The weather is rarely predictable and relying on an unpredictable system for energy is risky at best. |