The correct answer is (d) Solar cells. Solar cells are the most environment friendly energy source because they do not produce any emissions or pollutants. They also have a very low environmental impact during their manufacture and disposal.
Petroleum products are a non-renewable energy source that is derived from fossil fuels. They are a major source of greenhouse gas emissions, which contribute to climate change. Forest products are a renewable energy source, but they can have a negative impact on the environment if they are not harvested sustainably. Nuclear fission is a non-renewable energy source that produces radioactive waste. This waste can be difficult to dispose of safely, and it can pose a risk to human health and the environment.
Solar cells are a type of photovoltaic cell that converts sunlight into electricity. They are a clean and renewable energy source that does not produce any emissions or pollutants. Solar cells are also becoming increasingly affordable, and they are a viable option for meeting the world’s growing energy needs.