Paul Bogard’s “Let There Be Light” he gives many ways how to preserve natural darkness. He gives examples on how artificial light hurt humans, wildlife, and our ecosystem. “Little darkness meaning too much artificial light at night spells trouble for all.” Bogard successfully proves his argument by the use of data, figurative language, and solution. By the use of data in his article he got to prove his point of how light affects humans. Paul Bogard states “Our bodies need darkness to produce the hormone melatonin, which keeps certain cancers from developing, and our bodies need darkness for sleep.” This proves that with having harmful light no one can get enough sleep. Also the hormone melatonin prevents certain cancers which could save