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In addition to the large amounts of free radicals and pro-oxidants such as NO, NO 2 , peroxynitrite, phenol, and nitrosamines in the vapor phase of cigarette smoke, the particle phase contains high concentrations of quinones, which in biological systems undergo redox cycles to further produce O 2 and H 2 O 2 and other oxidant species
In addition, other tobacco companies use processed stems, reconstituted sheet tobacco and add other inexpensive, lower grade compounds
There is no heating element, so no combustion or vaporization
How scented candles contribute to indoor air pollution Despite claims to the contrary, all candleswhether their wax is made from all-natural beeswax, paraffin or soygive off soot as well as volatile organic compounds (also called VOCs, this refers to a wide range of chemicals that vaporize into air), causing some degree of indoor air pollution, Plugge says
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