First of all, no 1 blunt does not = 20 cigarrettes. cigarrettes are horrible for you. 4,000 chemicals, 50 chemicals which are KNOWN to cause cancer. Nothing in marijuana can cause cancer.
http://www.smokefreegwinnett.com/par...e%20Toxins.jpg

Yea theres chemicals in blunts and it has tar but no where near as bad for you as cigarrettes. smoking anything of course is not good for your lungs. And i would recommend smoking out of a bong, instead of a blunt, less tar and much safter and easier on your lungs.

And for your smokers cough,
#1 Cut back, you shouldn't be smoking that much daily, unless your trying to kill yourself.
#2 Exercise, Do Cardio, Run, Bike Ect. The MORE the better.
#3 Drink more water

yeppp!!!