Question 1
What does global warming usually refer to?
Question 2
What are greenhouse gases?
Question 3
What is the PETM?
Question 4
How long was the PETM warm up?
Question 5
How do we know global warming is real?
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Category :
What does global warming usually refer to?
What are greenhouse gases?
What is the PETM?
How long was the PETM warm up?
How do we know global warming is real?
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