MLA Citation: Bloomfield, Louis A. "Question 913"
How Everything Works 18 Jul 2018. 18 Jul 2018 <>.
913. How is sunlight both harmful and beneficial? - CP
Sunlight provides virtually all the energy in our world. Without it, plants wouldn't grow and we wouldn't have food or daylight. We wouldn't even have fossil fuels such as coal and petroleum because those were formed from vegetation that itself derived energy from the sun. However, sunlight also contains ultraviolet light, which can damage chemicals in biological tissue. Long exposure to ultraviolet light can age your skin or cause cancer.

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