Carbon monoxide of carbon dioxide by electromagnetic radiation of wavelengths shorter than 169 nm. Due to its long lifetime in the mid-troposphere, carbon monoxide is also used as tracer of transport for pollutant plumes. Carbon monoxide is a temporary atmospheric pollutant in some urban areas, chiefly from the exhaust of internal combustion engines (including vehicles, portable and back-up generators, lawn mowers, power washers, etc.), but also from incomplete combustion of various other fuels (including wood, coal, charcoal, oil, paraffin, propane, natural gas, and trash). Large CO pollution events can be observed from space over cities. Carbon monoxide is, along with aldehydes, part
Poulan featured in the 1974 movie "The Texas Chain Saw Massacre". The Poulan brand name is used primarily for outdoor power equipment, such as chainsaws, lawn mowers, and leaf blowers, aimed at the mid-level consumer market. Since Poulan is owned by Husqvarna, the two brands often share technologies. In recent years Poulan has offered a more upscale "Poulan Pro" brand employing a black and gold color scheme instead of Poulan's traditional green. As a result, Poulan products have been pushed even further upmarket. Along with Poulan, Jonsered and Husqvarna brand products, Husqvarna also provides lawn mowers, lawn tractors, and other yard