http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Of the 413,000 housing units in Montana in 2000, about 59,000 were mobile homes. However, almost half of existing mobile homes were manufactured before 1976, when a federal housing code was passed that required them to be built with more energy efficient options. Some of the homes manufactured before 1976 have little or no insulation. http://www.physorg.com/news148149157.html Technology Wed, 10 Dec 2008 16:32:37 EST news148149157