Chemical Irritation : Cigarette smoke contains over 7,000 chemicals, many of which irritate the throat lining, causing inflammation, swelling, and redness

In 1989, in response to preemptive legislation that had been proposed by the tobacco industry and enacted in a growing number of states, the national voluntary health agencies, acting through the Coalition on Smoking OR Health, took a strong anti-preemption position.29 It advised affiliates that it is better to have no law than one that eliminates a local government body's authority to act to protect the public health and suggested informing the appropriate legislator that unless the preemption is removed from the billyour organization can no longer support the bill.29 Despite this national policy, the state voluntary health agencies and Friedman defended the preemption language by arguing that because the bill would make all workplaces 100 percent smoke free, any local standard would be weaker, making the preemption issue moot.30-32 ANR representatives, on behalf of many local tobacco control advocates, did not accept this compromise
Microbiol Rev
Several studies showed that current smokers had lower BP levels compared to non-smokers 3
And although it is true that chewing tobacco doesnt cause lung cancer, it can cause cancers of the lip, tongue, cheek and throat