November 26, 2009

• EarthTalk: Living Buildings Explained

November 9, 2009

• EarthTalk: The Aesthetics of Windfarms

October 12, 2009

• EarthTalk: Rainforest Destruction and Enertia Houses

June 22, 2009

• EarthTalk: Do Sunspots Cause Global Warming and How Much Potential Energy is There in U.S. Oil Shale Reserves?

June 1, 2009

• EarthTalk: Charging Plug-in Hybrids Away From Home and Uranium Mining Near the Grand Canyon

May 4, 2009

• EarthTalk: Environmental Impact of the December Coal Ash Spill in Tennessee

April 20, 2009

• EarthTalk: What Carbon Neutral Really Means and Getting More High Mileage Diesel Cars on American Roads

April 6, 2009

• EarthTalk: Global Warming Skeptics

March 16, 2009

• EarthTalk: Polar Bears in Trouble and the Promise of Biomass

March 9, 2009

• EarthTalk: The Costs and Benefits of Plug-in Hybrids and Facts on Aerial Wolf Hunting

March 2, 2009

• EarthTalk: The Green Cities Movement

February 23, 2009

• EarthTalk: Geo-Engineering a "Fix" to Climate Change and Building a Sustainable Guitar

February 16, 2009

• EarthTalk: Does a Cold and Snowy Winter Mean Global Warming is Bunk?

February 9, 2009

• EarthTalk: How Microfinance Helps Developing Countries and Why America Needs a New Smart Grid

February 2, 2009

• EarthTalk: Green Rental Car Companies and Seeing the Forest for the Trees in Finding Recycled Paper Products

January 26, 2009

• EarthTalk: Do Volcanic Eruptions Emit More Greenhouse Gases Than From Human Activity?

January 19, 2009

• Earthtalk: Consequnces of Climate Change for the United States

January 12, 2009

• Earthtalk: Winter Heating – Conserving Energy and Saving Money

January 5, 2009

• Earthtalk: Rising Seas and Buying a New Car Vs. Keeping a Well-Maintained Used Car

December 29, 2008

• EarthTalk: How Much Old Growth Forest is Left and Alternative to Baby Bottles That Use Unsafe Chemicals