Answer
the atmosphere is the important part of what makes earth livable and it blocks the sun's dangerous ray from reaching the earth.
Solar is inconsistent due to time of day and/or weather.
Nuclear creates long lasting radioactive waste.
Hydroelectric construction of this resource destroys river ecosystems.
Coal creates pollution when burned.
Wind is inconsistent due to only to weather.
Earth is called a unique planet since it is the only planet in the solar system which supports life due to its balanced proportions of water, temperature, and oxygen