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Home Q & A Board Biology-Related Homework Help Environmental and Conservation Biology
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Alamojay Alamojay
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9 years ago
Which one of the following has been declining globally over the past several decades?
A) nitrous oxide levels in the troposphere
B) methane levels in the troposphere
C) mean global temperature
D) pH of the world's oceans
Textbook 
Environmental Science: Toward A Sustainable Future

Environmental Science: Toward A Sustainable Future


Edition: 12th
Authors:
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Super Cuban Dude
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JesuisMelJesuisMel
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4 years ago
thank you
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