India, May 21 -- In their 20s and 30s, young adults smoke without noticing any immediate health problem. Since everything 'appears' normal and nothing seems to disrupt their daily routine, they carry on with the habit casually, assuming it is not causing any serious, debilitating harm, yet. And smoking itself is taken incredibly casually, whether during office smoke breaks, at parties and social gatherings, while drinking with friends, or simply to relax, think creatively and deal with stress.ALSO READ: Bengaluru oncologist shares 5 daily habits that increase lung cancer risk: 'No safe level of smoking.'

But here's the oversight: the health effects may not be overt or immediately observable. The damage develops gradually and cumulatively...