NAR’s Green Designation is the only National Association of REALTORS-recognized real estate designation designed for agents looking to learn about issues of energy efficiency and sustainability in the various facets of real estate. As consumer demand for knowledge on these issues increase, so will your awareness of green issues.
A building technique involving dense compression of clay and dirt materials to create thick, flat surfaces, such as walls or floors.
A door that provides a pocket of air between the main door and the exterior door to improve insulation. Storm doors also protect the main door from wind, rain and ice.
A construction method that uses waste straw left over from crops, such as wheat, oats, barley, rye, rice and flax, after all the food has been extracted. Straw is gathered, baled, compressed and tied together. Bales are placed over a “stem wall” to protect the straw from the ground soil and the straw bales are stuccoed and plastered over for finishing.
According to the Intergovernmental Panel on Climate Change, SF6 is the most potent greenhouse gas that it has evaluated, with a global warming potential of 22,800 times that of CO2when compared over a 100-year period. Sulfur hexafluoride is also extremely long-lived, is inert in the troposphere and stratosphere and has an estimated atmospheric lifetime of 800–3200 years. Average global SF6 concentrations increased by about seven percent per year during the 1980s and 1990s, mostly as the result of its use in the magnesium production industry, and by electrical utilities and electronics manufacturers. Given the low amounts of SF6 released compared to carbon dioxide, its overall contribution to global warming is estimated to be less than 0.2 percent.
In Europe, SF6 falls under the F-Gas directive which ban or control its usage for several applications. Since 1 January 2006, SF6 is banned as a tracer gas and in all applications except high-voltage switchgear.
Hydrological droughts are typically described by a reduction in lake storage, a decrease of stream flow discharge, and a lowering of groundwater levels over large areas, over one year or several consecutive years.