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