Here are the climate-related sections of speeches by MPs during the Commons debate Carbon Emissions: Smoking.
Full text: https://hansard.parliament.uk/Commons/2010-01-06/debates/10010655000084/CarbonEmissionsSmoking
Mr. Drew
To ask the Secretary of State for Energy and Climate Change what estimate has been made of the effects of cigarette smoking on levels of carbon dioxide emissions. ( 306343 )
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Joan Ruddock
The Government have not made a detailed assessment of the effects of cigarette smoking on carbon dioxide emissions. As a plant product, the burning of tobacco is likely to result in zero net carbon dioxide emissions, although there will be other greenhouse gas emissions associated with the production and distribution of cigarettes.
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