Called one of the "7 Hottest CEOs " by Treehugger. com and one of Red Herring's "Top 25 Entrepreneurs under 35," Quayle Hodek is a pioneer in the field of renewable energy. As the CEO of Renewable Choice Energy, Quayle has been on a mission to convince companies that switching to renewable energy is the right thing to do, for the planet and the bottom line.

The next few decades will herald a global change in energy production. The age of renewables requires more than just photovoltaics and windmills: it needs storage systems in an unprecedented volume. However, conventional techniques of storage fail due to the high investments or the low efficiency. This appears to be a stumbling block for the desired change to renewable energy.

Shawn Qu follows the light -- actually he follows sunlight and turns it into electricity that powers homes and businesses around the world. As the chairman, president and CEO of Canadian Solar, Shawn is a leader in the fast growing solar energy market and putting Canada on the map for Canadian Solar's innovative technology.

What's the key to using alternative energy, like solar and wind? Storage -- so we can have power on tap even when the sun's not out and the wind's not blowing. In this accessible, inspiring talk, Donald Sadoway takes to the blackboard to show us the future of large-scale batteries that store renewable energy. As he says: "We need to think about the problem differently. We need to think big. We need to think cheap."

Today, we consume a truly vast amount of energy - with demand continuing to skyrocket at an alarming rate. We know that producing this energy has significant environmental impacts and emitting so much carbon dioxide into the atmosphere could cause catastrophic climate change. In this film, three academics look at wind power, carbon capture and storage (CCS) and material efficiency as examples of how we can cut our C02 emissions. They suggest that we must act now in order to avoid the serious risks of man-made global warming, one of our greatest challenges in the 21st century.

Scenarios for the future of renewable energy, Gill Ringland, SAMI Consulting. Presentation given at the Global CemPower conference on waste heat recovery (WHR) in the cement industry and other energy-intensive industries, 14 - 15 June 2012, London, UK.

The Energy Paradigm Shift Opens the Door to a Sustainable Society. A shift from economical use of limited resources to the unlimited use of clean energy is the ultimate dream of all mankind. The LUNA RING, our lunar solar power generation concept, translates this dream into reality through ingenious ideas coupled with advanced space technologies. Virtually inexhaustible, nonpolluting solar energy is the ultimate source of green energy that brings prosperity to nature as well as our lives. Shimizu Corporation proposes The LUNA RING for the infinite coexistence of mankind and the Earth.

Over the next 30 years virtually all urban population growth will take place in the developing world. The Rockefeller Foundation's Informal City Dialogues: http://www.nextcity.org/informalcity.

In the latest short documentary for the Informal City Dialogues, the women who perform one of Ghana's toughest jobs discover ways to improve their lives -- and their children's.

Informal housing is changing in Bangkok. Through a program called the Community Organizations Development Institute (CODI), more slum dwellers are being given the chance to take the lead in upgrading or resettling their homes. An alternative to top-down government solutions -- which sometimes do more harm than good -- CODI puts the people most affected by slum conditions at the forefront of the process.