Environmental concerns about rising pollution levels and climate change have focused the world's attention on the necessary reduction of harmful emissions from energy-producing processes. The generation of electricity from renewable sources such as wind offers considerable scope for the production of clean and sustainable power. CONDITION â USED: Books sold are in GOOD or better condition. Good Condition: Minimal damage to the cover, dust jacket may not be included, minimal wear to binding, most of the pages undamaged(e.g., minimal creases or tears), highlighting / underlining acceptable on books as long as the text is readable and markings are not excessive, no missing pages. May be a former library book, with usual treatments(e.g., mylar covers, call stickers, stamps, card pockets, barcodes, or remainder marks). Extra components, such as CDs, DVDs, figurines, or access codes are not included. ISBN: 9780470868997 ISBN10: 0470868996 Contributors: Heier, Siegfried, Waddington, Rachel,