Why is nuclear power considered to be a clean source of energy?
Nuclear power is regarded as a clean source of energy because it doesn’t produce (greenhouse gases, harmful waste products, enough energy) or (too much energy, helpful waste products, air pollution)

Nuclear power is regarded as a clean source of energy because it doesn’t produce harmful waste products or air pollution.

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

not sure if this is what you'r looking for nnew= nold