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According to arthropolis.com a day lasts 24 hrs on June 21 at the artic circle
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Answer:
Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide
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The answer is D I just took the quiz and got a 100%
The semilunar valve is usual peacemaker
