(Fortune Magazine) -- 1. Climate change

Book (and film) An Inconvenient Truth, by Al Gore. The science and implications of global warming.

Web realclimate.org; climatebiz.com

2. Alternative energy

Book The End of Oil: On the Edge of a Perilous New World, by Paul Roberts. Strategies for transitioning to a renewable-energy economy.

Web cleantechvc.blogspot.com; cleanedge.com

3. Sustainable business

Book The Triple Bottom Line: How Today's Best-Run Companies Are Achieving Economic, Social, and Environmental Success - and How You Can Too, by Andrew Savitz and Karl Weber. Out this month.

Web greenbiz.com; grist.org

4. Everyday environmentalism

Book Green Living: The E Magazine Handbook for Living Lightly on the Earth, by the editors of E Magazine. A green guide to everything from cars to investing.

Web thegreenlife.org; worldchanging.com

5. Building green

Book The Green House: New Directions in Sustainable Architecture, by Alanna Stang and Christopher Hawthorne. Eco-conscious design.

Web inhabitat.com; greenerbuildings.com