03.08.2009
A compact fluorescent light bulb (CFL) will save about $30 over its lifetime and pay for itself in about 6 months. It uses 75 percent less energy and lasts about 10 times longer than an incandescent bulb
An element with atomic number of 89 (actinium) to 102. Usually applied to those above uranium – 93 up (also called transuranics). Actinides are radioactive and typically have long half-lives. They are therefore significant in wastes arising from nuclear fission, e.g. used fuel. They are fissionable in a fast reactor.
Coalification is the alteration of vegetation to form peat
A reaction that stimulates its own repetition, in particular where the neutrons originating from nuclear fission cause an ongoing series of fission reactions.
Used in wind turbines
05.07.2009
Most wind turbines have appearances similar to airplane propellers or windmills. Newer, more efficient models may use a design more similar to a modified sail, turbine fan or pinwheel. The harvesting of wind energy for commercial sale is referred to as wind farming. Wind speeds as low as 5 mph can effectively drive a well-constructed wind turbine, but in most locales usable energy can only be produced about 30 percent of the time.