This book is based on the WorldDevelopment Indicators 2001 and its accompanying CD-ROM.Under the headings of agriculture, forests, biodiversity,energy, emissions and pollution, water and sanitation, and'greener' national accounts, it presents keyindicators of the environment and its relationship to peoplefor more than 200 countries. The data in this book are forthe most recent year available between 1997 and 2000, unlessotherwise noted. Regional data include only low- andmiddle-income economies. Aggregates for regions and incomegroups are shown only if data are available for 66 percentof the economies in that group. Countries included havepopulations of more than 30,000 or are World Bank members.