EESA10H3 Chapter Notes - Chapter 1: Health Promotion, Occupational Safety And Health, Environmental Disease

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Global warming, pop"n growth, habitat destruction, and resource depletion together produced well known environmental crises. Problems require profound social changes instead of immediate fixes. Human beings altering basic operations of earth"s atmosphere, geosphere, and biosphere. Human alteration of earth substantial and growing: btw 1/3 and of land surface transformed by human action, co2 conc"n in atm increased to approx. 30% since beginning of industrial revolution: more n is fixed by humanity than natural terrestrial sources combined, greater than of accessible fresh water put to use by humanity, of bird species on earth driven to extinction. Biologists observed declines in frog pop"ns around world including isolated envns. Health and reproductive success of amphibians damaged via: interactions btw increase in intensity of uv light (due to thinning of ozone layer: traces of globally distributed toxic chemicals, competition from introduced predator species. Declining health of frogs, birds + other organisms indicates environmental threat to human health.

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