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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (931083)	4/19/2016 11:06:47 AM
From: Wharf Rat	Read Replies (1) \| Respond to of 1572918

"Humans have been active on earth throughout the Holocene." We've been active during the Anthropocene, too. The big question is, "When did it begin?" The Early Anthropocene Hypothesis (sometimes called Early Anthropogenic) was proposed by William Ruddiman. [1] It posits that the Anthropocene era, as some scientists call the most recent period in Earth's history when the activities of the human race first began to have a significant global impact on Earth's climate and ecosystems, did not begin in the eighteenth century with advent of coal-burning factories and power plants of the industrial era, as was commonly assumed, but dates back to 8,000 years ago, triggered by intense farming activities after agriculture became widespread. It was at that time that atmospheric greenhouse gas concentrations stopped following the periodic pattern of rises and falls that had accurately characterized their past long-term behavior, a pattern that is explained by natural variations in Earth's orbit known as Milankovitch cycles. en.wikipedia.org