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Give examples and facts to support your answer. 
But in all likelihood, our impact is minimal. 40 million years from now it may be hard to find any evidence of our existence.
Indeed - Nature had an news article last week (12 May page 133) about the possibility of defining a new epoch, the Anthropocene. If you cannot get behind pay wall let me know and ...
Beginning in 1776 & the American Revolution?
QuoteBeginning in 1776 & the American Revolution?At the risk of being called Eurocentric - that's a bit of an odd choice. Geologically there isn't much difference between the redcoats and the minutemen. The two dates I heard discussed were the industrial revolution and the first use of atomic weapons.