Madam Speaker, nitrogen dioxide and sulphur dioxide are gaseous air pollutants composed of nitrogen, sulfur and oxygen. They are one of the groups of related gases called nitrogen oxides and sulphur dioxides. The health effects of nitrogen dioxide pollution include increased inflammation of the airways, worsening coughs and wheezing, reduced lung function and increased asthma attacks. They are, in fact, all a group of gases that, when we burn fossil fuels like natural gas and diesel, are burned at high temperatures. NO2, CO2 and other nitrogen oxides occur in the air and contribute to particle pollution; indeed, those effluents, those exhausts, are yellow-brown in colour. This is in response to my hon. colleague's earlier point of order when I suggested that the Halton Hills gas-fired power plant emits yellow and brown fumes. It does.
In the House of Commons on November 4th, 2024. See this statement in context.