Hydrazine occurs naturally as a product of nitrogen fixation by some algae and in tobacco and tobacco

Hydrazine and 1,1-dimethylhydrazine are industrial chemicals that enter the environment primarily by emissions from their use as aerospace fuels and from industrial facilities that manufacture, process, or use these chemicals. Treatment and disposal of wastes containing these chemicals also contribute to environmental concentrations. These chemicals may volatilize to the atmosphere from other media and may sorb to soils. These chemicals degrade rapidly in most environmental media. Oxidation is the dominant fate process, but biodegradation occurs in both water and soil at low contaminant concentrations. The half-lives in air range from less than 10 minutes to several hours, depending on ozone and hydroxyl radical concentrations. Half-lives in other media range up to several weeks, under various environmental conditions. Bioconcentration does occur, but biomagnification through the food chain is unlikely.