"A brief introduction to geothermal: the next wave of clean and sustainable energy."

"Use the renewable solar energy stored in your yard to save on heating, cooling and hot water costs. WaterFurnace geothermal heat pumps are good for the environment and great for your budget."

"Video on the benefits of geothermal heat pumps as an alternative heating and cooling solution. No more propane or oil burning in the winter."

"This video shows residential installation of a Direct Exchange (DX) Geothermal system."

"TERRASource geothermal systems can save 40 percent to 70 percent on home-heating and 30 percent to 50 percent on home-cooling costs over conventional systems."

"The dimmer allows consumers to control the amount of natural light entering the home through their tubular skylight.."

"The next generation of thin-film, low-cost solar cells."

"12 year old boy genius invents new type of solar."

"This video shows how free energy can be generated by a solar powered Stirling engine."

"TRoy McAlister and Steven Harris demonstrate a solar fuel cell and electrolyser."