Carbon dioxide concentrations in the atmosphere today are: Choose the best answer. Higher than predictions by the IPCC for concentrations at the end of the 21st century Higher than any time in at least the last 2.1 million years Lower than during the 1940’s to 1970’s when the earth was cooling Lower than during the last Ice Age

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Carbon dioxide concentrations in the atmosphere today are:

Choose the best answer.

Higher than predictions by the IPCC for concentrations at the end of the 21st century
Higher than any time in at least the last 2.1 million years
Lower than during the 1940’s to 1970’s when the earth was cooling
Lower than during the last Ice Age
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