cigarette

At last: Something GOOD about smoking! Birds in Mexico City are lining their nests with cigarette butts they pick up off the street, and scientists have discovered that they repel pests and keep the baby birds warm.

They’re filling their nests with up to 48 cigarette butts in order to make use of the repellent properties of tobacco. The nicotine and other chemicals in the cigarettes as a natural pesticide that repels parasitic mites (but what do they do to smokers?)
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