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The main source of endotoxin contamination in indoor environments is the result of infestation of Gram-negative bacteria.

Tampa, FL -- Out of various indoor contaminants, bacterial endotoxin may illicit significant health and hygiene effects. The bacterial endotoxin is a biochemical substance composed of a protein, lipid, and polysaccharide molecule known as LPS (Lipopolysaccharide) and/or LOS (Lipooligosaccharide) and is generally found in the outer membrane of Gram-negative bacteria. These substances are released into the ambient environment after the lysis of the bacterial cell wall, which contains them. Some Gram-positive bacteria such as Listeria monocytogenes may also produce an endotoxin-like substance.  

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by Michelle Krueger, Times Correspondent | nwitimes.com  

When it comes to air sealing and ventilating, new residential building codes are now in place to ensure energy efficiency as well as the comfort of the homeowner. In many existing homes, there can be a number of uncontrolled air leaks that add up to the equivalent of leaving a window open 24/7.

While its been reported that air sealing uncontrolled leaks can reduce energy bills anywhere from 10-20 percent or more in some cases, its important to understand a home's ventilation before undertaking any project. The advice of a certified home contractor may even be needed to avoid creating...

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by Mike Lyons ~ First Coast News  

Advice provided by Claire Moloney, LEED Green Associate, Cornell University | Green-Buildings.com

The Green Advantage credential is designed for professionals who work in construction, such as contractors, subcontractors and tradespeople. To earn the credential, the professional must take two exams, which test on green building concepts, materials and techniques. It is more focused on the building practitioner's actions "in the field" rather than the design process, though it covers both.

The credential was designed by...

by Walter Hamilton | Los Angeles Times

Many Americans are confused about the basic elements of homeowner insurance policies, according to a new study.

More than four in 10 people wrongly think that the policies cover mold damage and 73% don't realize that the policies do cover personal items that are stolen from a car, according to the poll by InsuranceQuotes.com.

Perhaps most dangerous for anyone in California, 51% are unaware that earthquake coverage is not covered by standard homeowner policies, the study found.

Poll respondents did better in knowing that...