Neil Hirst, director for energy technology and R&D at the International Energy Agency in Paris, France, discussed how we could face the triple challenges of rising energy demand for economic growth, severe climate change and threats to energy security. For the first time ever, the IEA has analyzed what would be needed to achieve deep cuts in CO2 emissions. This comprehensive study demonstrates that a more sustainable energy future is possible, and that new technologies such as carbon capture and storage and renewables are key. In an ambitious series of global scenarios to 2050, it identifies what needs to be done to bring these technologies into the mainstream and transform the way we produce and use energy.