sentence: Nuclear waste emits dangerous radiation and is difficult to dispose of.
sentences_before: They are one of the cleanest producers of power, replacing the burning of fossil fuels and eliminating nuclear waste. Burning fossil fuels produces smoke and ash, and toxic gases such as carbon monoxide.
sentences_after: They use a renewable energy source and are designed to operate for decades. They produce significant amounts of the world's electrical supply.
concept_name: nuclear waste
headings: Water turbine Environmental impact
categories: Tools Electricity Hydropower