The second season of E2 has begun on PBS, and it's a must-see for anyone interested in sustainable design and clean energy technology. Brad Pitt and Morgan Freeman are the narrators to the series which highlights how progress can go hand in hand with environmentally friendly policies.

Episodes focus on wind energy, developing nations, and "clean" coal and nuclear power. The shows will be on TV weekly during the next few months, and individual episodes are streamed online.

Pitt gives more than lip service to the cause and is building eco housing in Louisiana. Celebrities are having a beneficial impact in bringing their star power to the importance of green design and energy that go hand in hand with profitability.