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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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PeterMartin PeterMartin
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7 years ago
What best describes how carbon dioxide concentrations in the atmosphere have changed in the last 500 years?
A) Concentrations were mostly steady until ~1850 when they began to increase.
B) Concentrations increased until ~1850 when they began to decrease.
C) Concentrations decreased until ~1850 when they began to increase.
D) Concentrations varied wildly until ~1850 when they became more constant.
E) Concentrations have remained constant throughout history.
Textbook 
Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes

Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes


Edition: 4th
Authors:
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apolloniosapollonios
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7 years ago
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PeterMartin Author
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7 years ago
Thanks
ezsancheezy
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Yesterday
You make an excellent tutor!
jmendoza
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2 hours ago
this is exactly what I needed
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