Question

which statement about the waste materials from nuclear power plants is true? the waste gives off bursts of radiation over a short time. the waste produces small amounts of greenhouse gases for a long time. the waste emits harmful radiation for a long time. the waste generates a large amount of carbon dioxide over a short time.

Explanation:

1. Analyze the first option: Nuclear waste radiation is not short - burst; it's long - term, so this is wrong.
2. Analyze the second option: Nuclear waste doesn't produce greenhouse gases (greenhouse gases like CO₂ are from fossil fuel combustion), so this is wrong.
3. Analyze the third option: Nuclear waste (radioactive waste) emits harmful radiation (like alpha, beta, gamma radiation) for a very long time (thousands of years for some isotopes), this is correct.
4. Analyze the fourth option: Nuclear power plants don't generate large amounts of CO₂ (unlike fossil fuel plants), and nuclear waste doesn't produce CO₂, so this is wrong.

Answer:

The waste emits harmful radiation for a long time.