Hi Everyone ! Today I was study about respiratory pathologies . I have noticed one things . Most of the diseases related to respiratory system are due to smoking . As in old days smoking was taking as a fashion . Now as modern world has learned this type of fashion can cause serios health issues . Be aware that not only active smoker but also passive smoker is also in danger .active smoker are ones those smoke by themselves .passive smokers are those whose inhaled the smoke of other but dont smoke at all .