<span>Hydroelectric energy uses the movement of water to spin a turbine and produce electricity. Coal is a fossil fuel that is burned as an energy source, which results in emissions such as carbon dioxide, nitrogen, and sulfur. Coal use is associated with waste products both from the mining process to acquire the coal and also from the actual use of coal itself. Hydroelectric energy does not involve waste, but does pose potential problems to waterways. Coal use is more common than the use of hydroelectric energy.</span>
I don't understand your question
The x axis. This is because the numbers go on the side so the years have to go on the bottem
Answer:
Explanation:
Physical changes changes when objects or substances undergo a change that does not change their chemical composition.
