The "Sustainable World series tackles environmental issues that affect our world in clear, accessible ways, so that young readers are introduced to difficult concepts with relative case. Each title in this series covers the particulars of a problem--the origins of the problem, factors that compound it--and then moves forward to highlight programs and movements that are being explored and implemented worldwide to combat the issues. These books are progressive and earth-conscious, offering a wide array of possible ways young readers can get involved in their community and work toward environmental awareness, education, and action. Full-color photographs, glossaries, bibliographies, and numerous website listings enhance each volume. This volume explores how topics like transportation, nonrenewable energy sources, and urbanization are interrelated in their effects on the world's environment. Discussion of damage to ecosystems from various human activities is balanced with explanations of forward-thinking movements like agroforestry and ecotourism. Numerous websites throughout the text offer avenues for readers to explore.