How can we change from our oil, coal and gas guzzling present into a future powered by sustainable forms of energy? It's not just a need to reduce carbon dioxide emissions that is fueling the development of alternatives to fossil fuels, governments are being spurred into action in the name of energy security as our need for more energy increases every year. How are attitudes and technology reacting to help us harness the energy of the sun, wind and waves to meet our voracious energy demands?