The answer is pollution, because solar energy is costly, difficult to maintain, and fairly complex.
Answer: Pollution
Explanation: Solar energy can be defined as the radiant energy from the Sun that is harnessed using a range of technology. It is the range of ever evolving technology that uses solar heating, photovoltaic, solar photosynthesis.
This is a renewable form energy which is can be replenished again and again. Solar energy is a non polluting source of energy. It neither releases any harmful gases nor produces any sound.
So the correct answer is pollution.
