In short, because the UV rays damage skin cells, which increases the risk of a mutation possibly leading to skin cancer.
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Answer: Meth
Explanation:
Meth is a stimulant that affects the "Pleasure Reward Pathway" by altering the reuptake of the neurotransmitter dopamine, consequently leaving an excess dopamine in the synapse. It also increases the activity of the dopamine synthesizing enzyme Tyrosine Hydrolase, thus ensuring continuous release.
Answer is chemical energy.
The fuel used in car is petroleum product which is a fossil fuel. Petroleum products such as petrol or diesel are chemical compounds in which chemical energy is stored in their bonds. When these compounds undergo chemical reactions, resulting in breaking of bonds and releasing energy. When ignition of a car is on, the energy is released when chemical bonds are broken. The released energy is carry out work in the car system.