Producing electricity from renewable energy sources has undeniable appeal, both for environmental reasons and for reducing our dependence on fossil fuels. This book assesses the outlook for six leading renewable energy technologies: small hydro power, solar photovoltaic, concentrating solar...

Cities around the world face enormous problems of transport sustainability. Rapidly increasing populations and vehicle usage have created gridlock and sprawl, even in very poor cities, as well as unacceptably high levels of air pollution, noise, and accident rates. But improvements can be made....