. Earth tones-- : the book : federal science for sustainable development . Introduction Five heads are better than one Show and tell 5 6 7 Biodiversity Low sea survival threatens salmon Taxonomy on the Web 8 8 10 Climate change Urban jungles: reaping the benefits Soil sinks: C02 reservoirs 12 12 14 Toxins in air and water A drain on the environment: acid mine drainage and hog manure When pond scum is poison 16 16 18 Health and Canadians Amphipod barometers for PCBs Raw milk cheeses 20 20 22 Canadians pitching in Wildlife watchers Saving energy at home 24 24 26 Conclusion 28

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