www.Goinggreenathome.org  - Montgomery County Park and Planning Commission offers free presentations from experts on how homeowners can reduce energy costs and lessen their impact on the environment.

www.Green.yahoo.com - Extensive information for technology, home and garden, transportation, food and health; even calculates your carbon footprint.

www.catalogchoice.org - Free sign-up service to decline unsolicited catalogs - lighten your footprint on the environment.

www.Freecycle.org - Grassroots, nonprofit organization dedicated to the exchange of free items and keeping "good stuff out of the landfills." This site helps keep over 300 tons a day out of landfills.

www.Friendsofrockcreek.org - Promotes a healthy and sustainable Rock Creek watershed through conservation, education and restoration.

www.planetark.com - Ways for business and individuals to lessen their impact on the environment.

www.greenbuildinginstitute.org - Provides sustainable building practices through education and example.

www.energystar.gov  / www.energysavers.gov - Energy Star is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy to help save money and protect the environment using energy efficient products and lifestyles.