- another term for nitric oxide
- ‘He said burning insulated copper cable, plastics and tyres released into the air poisonous gasses like nitrogen dioxide, nitrogen monoxide and sulphur dioxide.’
- ‘He said there would be 42 per cent less nitrogen monoxide, 40 per cent less sulphur dioxide and 26 percent less carbon dioxide.’
- ‘The airliner descends on Tehran through a noxious haze of carbon and nitrogen monoxide, ozone, and sulfur.’
We take a look at several popular, though confusing, punctuation marks.