Tobacco kills up to half of its users and nearly six million people each year. While tobacco consumption is decreasing in some countries like the UK and US, it is increasing in low-income countries. Tobacco causes numerous health issues like heart disease, lung disease, cancer and complications in pregnancy. Smoking also causes other issues like tooth discoloration and skin aging. Young people smoke due to perceived coolness, peer pressure, rebellion and addiction. Secondhand smoke harms both adults and children. Efforts to curb the tobacco industry include taxation, health warnings on packs, and restricting advertising.