The biggest disadvantage of coal is that it will one day run out with how fast the economy is using it today. It also creates carbon dioxide, which is hard to breath and also clogs up the atmosphere, making it thicker and trapping more heat. a better alternative is wind, solar, and water energy. these are clean, electronic ways to power and save our world
Alcohol would and could kill germs. Just at the Chinese civilizations was able to survive because they boiled their water for tea, beer in Mesopotamia allowed humans to live long enough to create institutions and culture