How does the use of hydroelectric energy compare to the use of coal? a.
Hydroelectric energy is more commonly used than coal.
b.
Hydroelectric energy is associated with less waste production than coal.
c.
Hydroelectric energy has a larger environmental impact than coal use.
d.
Hydroelectric energy requires more land space than coal use.

B.) Hydroelectric energy is associated with less waste production than coal.

Explanation:

While coal produces ash, CO2, CO, NOx, SOx, and many other waste products, hydroelectric energy has no waste products and doesn't pollute the environment.

not sure if this what   you'r looking for would be percent composition

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