(1) nitrogen oxide(2) Power plants will be expected to reduce emissions of mercury, sulfur dioxide, and nitrogen oxides .(3) It would set new caps for nitrogen oxides , sulfur dioxide, and mercury.(4) Exhaust from the automobile can contain carbon monoxide and nitrogen oxides , which are poisonous gases.(5) Nitrates are formed from reacting nitric acid with metal oxides , hydroxides, or carbonates.(6) The gases, particularly sulphur dioxide and oxides of nitrogen, then dissolve in water vapour in the air.
