The hi-lo series makes a key topic in the middle school science curriculum accessible to students reading below grade level. Clear text describes the world's energy needs and resources in the twenty-first century and looks at the impact of energy usage on the global climate. This series looks at eight energy sources and discusses their availability, production processes, and environmental consequences. Easy-to-understand diagrams, maps, charts, and full-color photographs support the text and aid comprehension. HI-LO/reading level grade 3, 32 pages each, full-color illustrations paperback. Save $1 per book when ordering 10 or more copies.