Of course smoking is very bad for the health. You might get less colds and flu and enjoy a socially more active life while you are a smoker, but giving up smoking will give you benefits to your health which will far outweigh any positives for remaining a smoker. For a start, your life-span will surely be extended.
Smoking damages your eyesight. All that smoke drifting up past the delicate eye membranes actually causes damage to the nerves and the lens of the eye. The sinuses and ears are affected, and you lose your sense of smell.
Apart from the obvious damage ...
