As a Futurist: Optimist or Pessimist?

As a Futurist, why I am an optimist about our ability to transform our future world in a positive and sustainable way. Part of keynote on the $40 trillion green tech revolution which could transform the future of our planet, with innovations that will provide answers to global warming if rolled out on a large enough scale. Impact of technologies already available in energy industry, water conservation, carbon reduction, recycling, power transmission over long distances, alternative power generation, buildings management. Conference keynote speaker and Futurist Patrick Dixon -- author of SustainAgility book, lecture for Suez Environmental global leadership team.