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© 2024 Portland State University and the Oregon Historical Society

The Oregon Historical Society is a 501(c)(3) non-profit organization. Federal Tax ID 93-0391599

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anthropogenic climate warming

The warming of Earth caused by human activity.

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© 2024 Portland State University and the Oregon Historical Society

The Oregon Historical Society is a 501(c)(3) non-profit organization. Federal Tax ID 93-0391599

© 2024 Portland State University and the Oregon Historical Society

The Oregon Historical Society is a 501(c)(3) non-profit organization. Federal Tax ID 93-0391599