There is two sides of Mirror. ONE I Positive and other is negative.
As per positive sides are concern:
1 it should definitely be banned for numerous reasons eg it kills, costs. There are over 200 poisons in tobacco smoke alone. This kill your brain cells, it hurts your lungs, and it's not healthy either.
2. Eliminates a public health menace Passive smokers get more harm than active smokers. It means people surrounding that smoker are at a greater risk of getting heart disease.
3. In the UK, the percentage of British smoker's in 1979 was 45%, by the early 1990's is was 30%, by 2010 it was 21%.
So while it is decreasing, it is doing so very slowly, and during this time, many people are dying. Around 107,000 people died in 2007 in the united kingdom due to smoking-related diseases, 86% percent death's from lung cancer are from tobacco smoking.
Banning smoking would prevent many deaths from happening.
4. Second hand smoke like bidis which 30% people use as alternative and cheapest version of cigarettes can cause lung cancer in young children with weak immune systems.
5. Government spends every year 106, 000 crores on treatment of age group between 35 to 65.
Negative side:
1. Government loose a lot of revenue.
2. People will have smoke whatever, whenever way, whichever it is banned or not.
3. It is the source of relaxation for people, it work as a stress revival.