Question

a)Which gases are released from petroleum refineries​

Answer 1

Answer:  Finally, refineries emit many gases like sulphur dioxide (SO2), nitrogen oxide (NO2), carbon dioxide, carbon monoxide, methane, dioxins, hydrogen fluoride, chlorine, benzene and others. Many of the gases emitted by refineries are harmful to humans, and can cause permanent damage and even death.

Explanation:

Answer 2

Answer:

Nitrogen oxides (NOx), carbon monoxide (CO), hydrogen sulfide (H2S), and sulfur dioxide (SO2).

Refineries also release less toxic hydrocarbons such as natural gas (methane) and other light volatile fuels and oils.