QLav Personal Hygiene System
Product Description
High quality durable medical grade LDPE plastic. Unbreakable, self contained. lightweight (180 grams) for easy personal cleansing at home or while traveling…. More >>
QLav Personal Hygiene System
Solar Water Heating–Revised & Expanded Edition: A Comprehensive Guide to Solar Water and Space Heating Systems
Product Description
Heating water with the sun is a practice almost as old as humankind itself. Solar Water Heating, now completely revised and expanded, is the definitive guide to this clean and cost-effective technology. Beginning with a review of the history of solar water and space heating systems from prehistory to the present, Solar Water Heating presents an introduction to modern solar energy systems, energy conservation, and energy economics. Drawing on the authors’ experiences as designers and installers of these systems, the book goes on to cover: Types of solar collectors, solar water, and space heating systems and solar pool heating systems, including their advantages and disadvantages System components, their installation, operation, and maintenance System sizing and siting Choosing the appropriate system This book focuses on the financial aspects of solar water or space heating systems, clearly showing that such systems generate significant savings in the lo… More >>
Solar Water Heating–Revised & Expanded Edition: A Comprehensive Guide to Solar Water and Space Heating Systems
Radio Waves
Description
What do cellular phones, car navigation devices, air and traffic control systems, many astronomical instruments and satellite communications have in common? Radio waves. Some of the ways humans create and interfere with these waves are explored…. More >>
Radio Waves
USA Commemorative Stamps, Issued 1977: Energy Conservation, Christmas, Bicentennial, more
Product Description
These commemorative stamps were issued in 1977. Many feature Bicentennial themes, including a Christmas stamp commemorating the difficult winter George Washington and his troops experienced at Valley Forge. Other topics include energy conservation and the 50th anniversary of the first “talkie” motion picture. All stamps are Mint Never Hinged (MNH) and enclosed in protective covers; they are not pasted or glued onto the page…. More >>
USA Commemorative Stamps, Issued 1977: Energy Conservation, Christmas, Bicentennial, more
Water Conservation
Amazon.com
Every day, the population of the Earth increases while our water supply decreases. Many sources have become too polluted to use, and in some places, people remove more water from the Earth than the rain supplies. “Water Conservation” outlines the most important water-saving techniques that can be used at home. By following these suggestions, one family could easily save 100 gallons of water a day. Produced by Norman Bean.(For Home Use Only)This product is manufactured on demand using DVD-R recordable media. Amazon.com’s standard return policy will apply…. More >>
Water Conservation
