These Internet links access sites that may be of interest to you.
How Stuff Works http://www.howstuffworks.com Articles on how many commonplace items work. Including refrigerators, water heaters and toilets.
Underwriters Laboratories Inc. http://www.ul.com Have you ever wondered what the UL mark on many of your household appliances was about? Well this site will tell you all about the organization behind the tag. There is also a section for just consumers with safety tips and consumer news.
The copper page http://www.copper.org Information about copper in all its many forms. There are links to pages that describe the benefits of using copper wire, and piping to upgrade existing heating, plumbing and electrical systems.
National Fenestration Rating Council http://www.nfrc.org NFRC rates the energy performance of window, door, or skylight products.
American Solar Energy Society http://ases.org Promotes the use of solar energy to benefit the US and global environment. Information and publications on solar technologies are available in their Publications Catalog.
Office of Ground Water & Drinking Water http://www.epa.gov/safewater An EPA department with a variety of information on water supplies around the country. Individual communities drinking water conditions are in a searchable database off the main page.
Radon Information Center http://www.radon.com Scientific and solution information about a radioactive gas that can be a problem in many homes.