Smoking damages IQ

Scientists have, for the first time, linked smoking with impaired mental agility in a study which shows that the habit can reduce a person’s IQ by up to 3%. They claim this dip is enough to affect smokers’ quality of life, making them less efficient at performing everyday tasks such as counting change or doing crossword puzzles. The study also appears to contradict an earlier report which suggested that smoking might help protect people from dementia.
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