• approximate number of species that go extinct per hour

• percent by which electricity demand is rising annually in China and South Asia

• percentage of the energy used in U.S. manufacturing that goes toward food processing and packaging

• percent reduction in the average household’s water pollution if it converts from buying conventional produce and grains to buying organic

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• factor by which global water consumption rose between 1900 and 1995

• the world population, in billions, as of October 12, 1999

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1 — Natural Resources Defense Council
2 — World Resources Institute
3 — U.S. Energy Information Administration
4 — Earth Communications Office
5 — World Resources Institute
6 — U.N.