With greenhouse gas emissions warming Earth and climate change increasing natural disasters, people and governments must reduce their dependence on nonrenewable fossil fuels and move to clean, renewable energy sources. This series provides a comprehensive overview of six energy technologies that will protect and power Earth's future. Each book includes a table of contents, an infographic, informative sidebars, a That's Amazing special feature, quiz questions, a glossary, additional resources, and an index. This Focus Readers series is at the Navigator level, aligned to reading levels of grades 3-5 and interest levels of grades 4-7.