Foreword -- Introduction -- Is clean energy underutilized? Overview: The benefits of using renewable energy / Union of Concerned Scientists ; Blueprint for a clean and secure energy future / The White House ; How solar energy can power the Internet of Things / Jeff Kettle ; The US solar market is on the rise / Larry Sherwood ; Clean energy soared in the US in 2017 / Erica Gies -- Is clean energy affordable? Overview: Green and low-cost energy from inexhaustible sources / RESET ; Debunking the myth that coal is cheap / Gary Cohen ; The advantages of wind energy / US Department of Energy ; Barriers to renewable energy / Union of Concerned Scientists ; Germany's energy transition stirs controversy / Sören Amelang -- Does clean energy work? Overview: Possible scenarios in the future of energy / World Energy Council ; Renewable energy can provide most of the United States' electricity / Union of Concerned Scientists ; The bright future of electricity / World Economic Forum ; Biomass and its environmental impacts / US Energy Information Administration ; The many variables of renewable energy / Jeremy Williams ; The environmental impacts of wind power / Union of Concerned Scientists -- Is it possible for renewables to be widely used around the world? Overview: International surge in hydropower development / World Energy Council ; An Indian state leads the way to wind power / John McKenna ; The necessity of government investment in clean energy / Richard W. Caperton ; The cost of clean energy for developing countries / Tucker Davey ; Federal investment in clean energy is too high / Megan Nicholson and Matthew Stepp -- Organizations to contact.