In the modern age , human society runs on energy . most machines need electricity to operate . human have many different ways to create electricity . but some ways are harmful to the environment .
For example , fossil fuels are the most common kind of energy . they include coal ,oil, and natural gas. first , people have to mine them from ground . this can sometimes harm the environment . however , scientists are creating cleaner and more efficient ways to do that these days . so the environment is not damaged as much. but when people burn these fossil fuels , they can release gases that might harm the environment .
Tidal energy is another way to make electricity . this uses the ocean tides to make electricity . but some kinds of tidal energy can kill many fish and other sea creatures . also, dams can create lots of clean hydroelectric energy . but dams create lakes and change the courses of rivers . so they can change the environment very much.
Nuclear energy is a very powerful form of energy . it is cheap . it is also very clean . but many people are afraid of it because it uses radioactive materials . also , there have been some accidents at nuclear power plants in the past . but the technology is much better these days . so many countries are starting to build more nuclear power plants now.