Benzene is found in crude oil and is an important industrial chemical, both as a solvent and as a chemical feedstock to make polymers such as polystyrene. It used to be used routinely in schools and universities but since the 1970s it is now illegal to use or store benzene in schools in many countries in the world as it can cause blood disorders and is a known carcinogen.Benzene (бензол) can still be found in school...