"The Grid" is a complex network of power plants, transmission lines, towers, switches and meters that deliver electricity to run your home, office and business. Most of us just flip a switch and don’t give much thought to how electricity is produced, transmitted and delivered or its effect on the planet. 50% of electrical power is generated by coal in the United States. Coal powered plants emit ash, particulates, chemicals and greenhouses gas as a byproduct and are considered a dirty source of energy. A variety of other sources of energy are used to make up that other 50% - natural gas, nuclear, wind, solar and hydroelectric.

Big questions remain: How do you integrate all these alternative energy sources into the grid? Can the grid produce electricity that is clean, cheap and reliable so that we have a green grid? Join Robert Colangelo as he interviews three guests who explore how to green the grid:

Marshall Brain, Creator and Founder, HowStuffWorks.com

Michale Kanellos, Editor-in-Chief, Green Tech Media

Bret Constantz, CEO, Calera

Robert will also examine this week's unveiling of the Bloom Energy Server. Will this fuel cell technology live up to its claims of becoming the future of energy by offering cleaner, more efficient, affordable power?