Coal produces ash, which is made of metal oxides and alkali.
It also produces arsenic, mercury, chromium, and cadmium. The average coal-burning power plant produces 125,000 tons of ash and 193,000 tons of sludge each year.

Nuclear reactions produce three types of waste with varying levels of radiation: low, medium, and high. Low level wastes (LLW), take up 90% of the total waste.

Solid Waste Produced