gas emissions
61greenhouse gas — UK US noun [C or U] ENVIRONMENT ► one of several gases, especially carbon dioxide, that prevent heat from the earth escaping into space, causing the greenhouse effect: »We need a global system for limiting greenhouse gas emissions. »Radical steps …
62greenhouse gas — any of the gases whose absorption of solar radiation is responsible for the greenhouse effect, including carbon dioxide, methane, ozone, and the fluorocarbons. [1980 85] * * * ▪ atmospheric science Introduction any gas that has the property of… …
63Natural gas vehicle — NGV redirects here. For the art gallery in Melbourne, Australia, see National Gallery of Victoria. Fueling (Fiat Multipla) …
64Liquefied petroleum gas — (also called LPG, GPL, LP Gas, or liquid propane gas) is a flammable mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles. It is increasingly used as an aerosol propellant and a refrigerant, replacing chlorofluorocarbons …
65Automobile emissions control — covers all the technologies that are employed to reduce the air pollution causing emissions produced by automobiles. Exhaust emissions control systems were first required on 1966 model year vehicles produced for sale in the state of California,… …
66Exhaust gas recirculation — (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in most gasoline and diesel engines.EGR works by recirculating a portion of an engine s exhaust gas back to the engine cylinders. Intermixing the incoming air with recirculated… …
67Continuous emissions monitoring system — CEM systems were historically used as a tool to monitor flue gas for oxygen, carbon monoxide, and carbon dioxide to provide information for combustion control in industrial settings.[1] They are currently used as a means to comply with air… …
68Motor vehicle emissions — Steam from tailpipe of cold car Typical appearance of car exhaust on a correctly …
69Volcanic gas — Volcanic gases include a variety of substances given off by active (or, at times, by dormant) volcanoes. These include gases trapped in cavities (vesicles) in volcanic rocks, dissolved or dissociated gases in magma and lava, or gases emanating… …
70Liquid-to-gas ratio — An important parameter in wet scrubbing systems is the rate of liquid flow. It is common in wet scrubber terminology to express the liquid flow as a function of the gas flow rate that is being treated. This is commonly called the liquid to gas… …
