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1. In the 1970’s scientists _______ that greenhouse gases were building up in the atmosphere.  (air)                            (look, find, hear, talk)

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1. In the 1970’s scientists _______ that greenhouse gases were building up in the atmosphere.  (air)                            (look, find, hear, talk)

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2. Scientists _____ that greenhouse gases ____ making the atmosphere hotter.  (hear, say, look) (is, rise, do)         

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2. Scientists _____ that greenhouse gases ____ making the atmosphere hotter.  (hear, say, look) (is, rise, do)         

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3. Scientist warned us about global warming and _______ many studies about the dangers.

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3. Scientist warned us about global warming and _______ many studies about the dangers.

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4. What did scientists say would happen if it got hotter? 

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4. What did scientists say would happen if it got hotter? 

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5. Extra Credit: What else did scientist say?

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5. Extra Credit: What else did scientist say?

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6. Extra Credit: What else did scientist say?  

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6. Extra Credit: What else did scientist say?  