Hydrazine is found in cigarettes. Hydrazine is also found in rocket fuel.
"Smoking and Tobacco Control." U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, National Cancer Institute. Risks Associated with Smoking Cigarettes with Low Machine-Measured Yields of Tar and Nicotine, Oct. 2001: 180.http://cancercontrol.cancer.gov/tcrb/monographs/13/m13_complete.pdf
"HYDRAZINE, 1,1-DIMETHYLHYDRAZINE AND 1, 2-DIMETHYLHYDRAZINE." Agency for Toxic Substances and Disease Registry, June 2013.http://www.atsdr.cdc.gov/toxfaqs/tfacts100.pdf