Light-Emitting Diodes: Chasing White Light
September 11, 2007 12:16 PM - Courtesy of, BuildingGreen
Light-emitting diodes (LEDs) use semi-conducting materials to turn electricity into light; electrons jump from one material to another, emitting photons as they travel. Different semiconductor materials create different colors of light: most white LEDs use indium gallium nitride (InGaN), which actually emits blue light. The blue light excites a phosphor coating on the lens of the diode, creating a yellow light that mixes with the blue and makes it look white to the human eye. Manufacturers also use closely placed red, green, and blue LEDs to deliver white light.
Libya Creates World's Largest Sustainable Development
September 10, 2007 11:06 AM - Paul Schaefer, ENN
Libya - Libya today announced the creation of an unprecedented sustainable development on its beautiful northern Mediterranean coast. The massive project includes a world class sustainable resort and spa, extensive wind and solar on the coast and desert area, growth of biofuel crops, closed loop water systems, sustainable transportation, housing, and the creation of a huge national ecological parkland that includes protection of the Mediterranean ocean and incorporates Tripoli and other cities. The 5,500 square kilometer development, called Green Mountain, covers an area that is home to diverse animal and plant species and historic and archaeologically rich sites.
So Cal's First LEED Certified All-Solar Multi-Family Community.
September 8, 2007 09:01 PM - Paul Schaefer, ENN
ORANGE, Calif. - Orange County's first all-green new-home community, opened its sustainable model homes to the public this weekend. It's also trendy Orange County's first LEED Certified residential community, and its first all-solar multi-family community. The community is called "Deopt Walk". Models range from 1,277- to 2,010-square-feet, and start in the $600,000 dollar range.
New Product: Fencing Made From Ag Fiber And Recycled Plastic
September 8, 2007 06:46 PM - Mark Piepkorn, BuildingGreen
Torrington, Wyoming - Heartland BioComposites, of Torrington, Wyoming, has commercialized a new breed of composite wood using annually renewable wheat straw rather than wood flour, and has introduced its first product, a privacy fence. The company purchases regional wheat straw and compounds it with post-consumer high-density polyethylene (HDPE). The raw materials, which include 50â€“60% straw, 35â€“45% plastic, and less than 5% proprietary additives (described by the company as â€œnon-hazardous and organicâ€), are mixed, heated, extruded, and cut to length.
Philips Introduces Lower Mercury Fluorescent Lamps
September 8, 2007 06:35 PM - , BuildingGreen
Philips Lighting Company has announced a new line of T-8 fluorescent lamps using the companyâ€™s Alto II technology to replace its ten-year-old Alto technology.
Long Island Town Requires LEED Certification
September 8, 2007 06:30 PM - , BuildingGreen
Babylon, NY - Developers and builders in Babylon, New York, are preparing to register their buildings for LEED certification to comply with a 2006 local law that goes into effect in December 2007. The law requires all new commercial buildings larger than 4,000 ft2 (400 m2) to achieve at least a LEED Certified rating.
FEMA Investigates Emergency Housing Air Quality
September 7, 2007 04:20 PM - Jessica Boehland , BuildingGreen
Washington - The Federal Emergency Management Agency (FEMA) announced in August 2007 that it had suspended the installation, sale, transfer, and donation of emergency-housing trailers until concerns over high levels of formaldehyde can be investigated. A common ingredient in pressed-wood products, including particleboard, formaldehyde can cause eye, nose, and throat irritation; wheezing and coughing; fatigue; skin rashes; headaches; nosebleeds; and severe allergic reactions. The U.S. Environmental Protection Agency considers formaldehyde a probable human carcinogen, and the International Agency for Research on Cancer calls it a known human carcinogen.
Seattle Grocery Store Earns LEED Gold
September 7, 2007 04:11 PM - , BuildingGreen
Redmond Washington - The Redmond, Washington, branch of Seattle-based PCC Natural Markets became the first grocery store to achieve a Gold certification in any of the U.S. Green Building Councilâ€™s LEED rating systems. The store, certified under LEED for Commercial Interiors, features 28 skylights that bring daylight into the store and reduce general lighting electricity use to an anticipated 0.21 watts/ft2 (2.25 W/m2), an 86% reduction compared with a base case building in minimal compliance with Washington State code requirements; electricity use for accent lighting is expected to be 37% lower than code.
Tahoe Research Center Among 'Greenest' Buildings In World
September 7, 2007 02:06 PM - Paul Schaefer, ENN
LAKE TAHOE - One of only five such buildings in the world, the new home of the UC Davis Tahoe Environmental Research Center has received a Platinum LEED Certification from the U.S. Green Building Council. The center is located in Incline Village, Nev., on the north shore of the lake. The Tahoe Center is a 45,000-square-foot facility housing UC Davis's research laboratories, a public education center; Sierra Nevada College laboratories and classrooms; and office space for the Desert Research Institute and University of Nevada, Reno's Academy for the Environment. All of these functions are focused on understanding and preserving the unique ecology of the Lake Tahoe watershed.
Low VOC Paint For Euro Aircraft
September 5, 2007 02:10 PM - Paul Schaefer, ENN
MIELEC, Poland - A Polish aircraft manufacturer is the first in Europe to use an environmentally friendly zero-to-low-Volatile Organic Compound paint product for aircraft. "The new paint product uses 27 percent less material and has 41 percent fewer air emissions," said Robert Araujo, Manager of Environment, Health & Safety for Sikorsky Aircraft. "This was our Poland Team's first effort, and with the approval of the Polish government, we will continue to apply this technology to the benefit of a cleaner global environment." Araujo said the technology meets or exceeds the specifications set forth by the Polish government. "This has the potential to become the new standard in aircraft coating and paints," he said.