Which of the following best describes the long-term impact of using a renewable energy source

A. Biomass releases greenhouse gases when burned.
B. Geothermal energy can pollute water supplies.
C. Natural gas causes air pollution when burned.
D. Nuclear power produces harmful radiation.

A. is the answer.

B. is not correct because geothermal does not pollute.
C. Natural Gas is not renewable.
D. Nuclear Power is not Renewable, it uses mined uranium