Why has Australia's Aboriginal population had limited impact on their environment?

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Actually the Aboriginies impact has not been so limited. Since Australia's first settlers arrived at least 40 000 years ago and possibly 60 000+ it is difficult to see just what effect they had on their environment. There is some evidence which suggests that Australia's megafauna [large animals] dissapeared in the centuries following mans arrival. Whether this was due to man or climate change or a combination of both is still being debated. Aboriginals also burnt huge tracts of forest and scrub to expose food and also to create new growth which in turn brings in animals to graze. It is believed that over time this continual burning changed the species of forest trees that once existed into the predominantly eucalypt forest that exist today. Wherever man has gone in his travelings he has changed the land forever and Australia seems to be no exception.

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