The future of environmental history 5 needs while environmental historys roots as a discipline lie in environmentalism and in an understanding of the cultural construction of environment its practioners have di. Free online library bio invadersnon native species by reason humanities general philosophy and religion political science introduced species environmental aspects invasive species zebra mussel zebra mussels. Biological invaders from southern india to south america from guam to the great lakes a quiet but significant threat to ecological health and biodiversity is outrunning all efforts to control it. It has been noted however that the puritans found dandelions to be so useful that they brought them to settle in the new county modes of introduction throughout history dandelions have been purposely carried across oceans and continents by human beings
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