Green Living

 - Federal tax credits for energy efficiency

http://www.energystar.gov/index.cfm?c=tax_credits.tx_index

 - Calculate your carbon footprint

http://www.ecohatchery.com/calculator

 - Find your water footprint

http://www.gracelinks.org/1408/water-footprint-calculator

 - How clean is the energy you use?

http://www.epa.gov/cleanenergy/

 - Building Green

http://www.buildinggreen.com/

http://www.builtgreen.net/

http://www.greenresourcecouncil.org/

 - Living Building Challenge

http://living-future.org/lbc

 - Eco Building Guild

http://www.ecobuilding.org/

 - Recycling information

http://earth911.com/

 - National Geographic's Green Guide

environment.nationalgeographic.com