Flue gas Flue gas Flue gas is the gas exiting to the atmosphere via a flue, which is a pipe or channel for conveying exhaust gases from a fireplace, oven, furnace, boiler or steam generator. Quite often, the flue gas refers to the combustion exhaust gas produced at power plants. Its composition depends on what is being burned, but it will usually consist of mostly nitrogen (typically more than two-thirds) derived from the combustion of air, carbon dioxide (), and water vapor as well as excess oxygen (also derived from the combustion air). It further contains a small percentage of a number
Natural gas in the United States gas pipelines. The North American market, consisting of Canada, Mexico, and the United States, all connected by a common pipeline network, has had much lower gas prices in recent years than some other major world gas markets, such as Europe (since 2010), Japan (since 2008), and Korea. The United States is connected by pipeline to Canada and Mexico. The US has long imported large quantities of gas from Canada, and exported smaller quantities to some parts of eastern Canada. In 2014, the US imported 2,634 BCF from Canada, and exported 769 BCF, so that net imports from Canada totaled 1,865