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Human-Induced Climate Change May Have Started 3,000 Years Ago

Human-Induced Climate Change May Have Started 3,000 Years Ago

New research published in the current issue of Science suggests that human-induced climate change may have begun much earlier than previously thought.

A major vegetation change occurred in Central Africa about 3,000 years ago, when savanna grasses abruptly replaced rainforest vegetation. During the same period, chemical weathering intensified abruptly, reflecting a significant deviation from long-term weather patterns and fluctuations seen during the Late Quaternary Period.

These changes in weather patterns were concurrent with the widespread migration of farmers across Central Africa and a significant intensification in land use. Settlers likely cleared wide swaths of rainforests to create arable land for farming. Forest clearing had a notable environmental impact over 3,000 years ago, and remains one of the largest global sources of greenhouse gas emissions from human activity.

Image Credit: Sanne Roeman/Flickr

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One comment on “Human-Induced Climate Change May Have Started 3,000 Years Ago”

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Artur Sowinski
5 Years Ago

When posting alarmist's point of view on the claim of climate change being man made (backed by about 30 scientists), please also consider showing the 3000 scientist strong point of view on the subject: A simple explanation why real, unaltered UN data on climate change is wrong: http://www.youtube.com/watch?v=agyjz9pZfB4 All of the real facts known by modern science about climate change and man's participation in the event (not only cherrypicked by alarmist's): http://www.youtube.com/watch?v=4zOXmJ4jd-8 Thank you, and please have an open mind...


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