The drawback to using nuclear power is finding a safe place to dispose of the nuclear waste. About 6 percent of the energy used in the world comes from nuclear power. As it burns, water pipes are heated. This hot water is used to generate electricity. This is a small but growing source of energy.
Batteries create energy through chemical reactions.
When different chemicals react with one another, energy is released. Eventually the reaction stops, and the battery must be replaced. Batteries are used in motor vehicles and many smaller appliances, like clocks, hearing aids and toys. The National Wildlife Federation's Animal Tracks Activity Guide for Educators. Copyright National Wildlife Federation 1995.