Overture: Is anything safe? -- Chemicals lurking in your grocery store -- Pharmacy -- Is health food store an oxymoron? -- Infectious agents: are all microorganisms bad? -- Cancer and the environment -- Nature is elemental -- Natural and unnatural molecules in the environment -- Is the sky falling?? -- Dust, magnets, and scuba diving -- We are all radioactive! -- Epilogue : There is no free lunch.
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