Final answer:
The true statement about nuclear power is that it can pollute land due to the dangerous waste it produces, which requires secure long-term storage to avoid environmental damage. So, the option is D.
Step-by-step explanation:
Nuclear power plants generate electricity using fission without emitting air pollutants like those from burning fossil fuels. Therefore, these plants do not release greenhouse gases during operation and do not contribute to global warming. However, while nuclear energy does not produce direct air pollution, the management of nuclear waste is a significant environmental concern. Nuclear waste is highly radioactive and must be stored securely for thousands of years, posing potential risks of land and water pollution if not managed properly. Despite nuclear energy being a carbon-free source of electricity, the dangerous waste it produces requires careful long-term stewardship to avoid damaging the environment.
Therefore, D is the correct option.