Climate change and sustainability are important topics in the 21st century. Scientists have long warned that using fossil fuels to heat homes, power vehicles, and keep appliances running has negative effects on the environment, but there are many economic and social issues to consider when switching to alternative energy sources. Readers discover the debates surrounding various forms of alternative energy, the barriers that must be overcome in order to adopt them, and the benefits they can provide. Up-to-date statistics, annotated quotes from experts, full-color photographs, and informative sidebars help young adults form their own opinions about alternative energy sources.