Benzene
Correct! Benzene, a clear liquid chemical with a sweet smell, and a low vapor pressure. Benzene in the air comes from natural sources (forest fires, volcanoes) but mostly from human pollution such as car exhaust, industrial processes and consumer goods (glues, cleaning agents, paint strippers), and cigarette smoke. Most people are exposed to benzene via inhalation of the vapor. Benzene is a known carcinogen and responsible for a number of severe health disorders and has been linked to various types of leukemia.