According to WHO, levels above 20 ppm will cause impaired performance, a decrease in exercise capability, shortened time for angina response, headache, confusion, and respiratory failure
Out of doors where his life was principally led the chewer spat upon his lands without offence to other men, and his homes and public buildings were supplied with spittoons
But, while this might seem like a common-sense initiative, there is little evidence that such a policy, especially one that applies to both combustible and non-combustible tobacco at the national level, will have the intended effect
doi:10.1016/S0272-5231(02)00033-3 133
doi:10.3390/su132312994
The second-hand aerosol is not harmless water vapor. It places others at risk of exposure to nicotine and other chemicals that can be harmful to their health