Does smoking cause air pollution? © iStock

Does smoking cause air pollution?

Unfortunately your cigarette habit may be a factor in harming the environment as well as your health.

Asked by: Nick Pullen, Braintree


Cigarettes are made from tobacco leaves that originally absorbed all their carbon from the atmosphere as they grew. When you smoke them you’re just returning this carbon so the net effect is zero. But tobacco agriculture also generates greenhouse gases of its own, in the form of CO2 from the diesel used in farm machinery and NO2 from fertiliser – not to mention the CO2 attributed to packaging, distribution and advertising.

On the other hand, smokers live 10 years less than non-smokers on average. If those people didn’t smoke, they would have lived for another decade driving their cars, using electricity and buying things. This would generate much more CO2 than all the cigarettes they ever smoked. So smoking actually reduces global pollution, simply by eliminating the polluters!

Read more:


Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.