Green Mountain Energy - http://www.greenmountainenergy.com/
Green Mountain Energy Company is the nation’s leading retail provider of cleaner energy and carbon offset solutions. Green Mountain offers residential, business, institutional and governmental customers an easy way to purchase cleaner, affordable electricity products, as well as the opportunity to offset their carbon footprint.
Green-e: Renewable Electricity Program - http://www.green-e.org
This site describes the Green-e program, a voluntary certification of electricity companies that sell energy comprised of at least 50 percent renewable electricity resources. Participants in the program must increase the renewable components of their products by 5 percent each year for five years. The site also includes reasons why consumers should switch to a "green" company.
Renewable Northwest Project - http://www.rnp.org/GreenPower/default.html
Purchasing your utility's green power option will significantly reduce your environmental impact. Find information about why green power is a good deal for you, the environment, and the Northwest's economy. The site also features background information about renewable energy technologies, projects in Washington State and advocacy efforts.
Seattle Public Utilities - http://www.seattle.gov/util/About_SPU/News/News_Releases/SPU01_002560.asp
Seattle City Light customers can promote the use of clean, renewable energy by joining the Green Up program. Green Up allows customers to invest in the development of new renewable energy sources, such as wind power, geothermal and biomass energy, by adding $3 a month to their electricity bills.