Question: Compared to the average temperature recorded between 1951 and 1980, global temperatures are now about 1C higher about 1C lower O about the same O

Compared to the average temperature recorded between 1951 and 1980, global temperatures are now about 1C higher about 1C lower O about the same O about 10C higher D Question 50 The current concentration of carbon dioxide in our atmosphere is: 430 ppt 430% 430 ppm 430 ppb

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