Bioremediation is a way to clean up radioactive waste. It uses living things, like plants, bacteria, and other microorganisms, to absorb, break down, and remove the waste from the environment. For example, certain types of bacteria can absorb radioactive materials and turn them into harmless substances. The bacteria can then be taken away and safely disposed of. This method of cleaning up radioactive waste is very useful, because it is much safer than trying to move the radioactive material yourself, and it is usually cheaper too.