The origin of man took place about 200,000 years ago and looking at the records that are stored in the ice cores before the existence of man which were found by the deep drilling of the antarctic and Greenland shows that how the temperatures have changed and as the example of the carbon in the air.

As in the 800,000 years go the Carbon dioxide levels were on average of 170 to 280 ppm and now they have crossed the 400 ppm mark also at that time the sea levels were high as 80 feet and now are more than 100 feet.

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2. What does polar mean?

irina1246 [14]

Hello!

<h3>⭐What does polar mean? </h3>

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D. An unequal sharing of electrons

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<em><u>Chemical polarity or only polar is a property of molecules that represents the separation of electric charges in the same molecule (see also electric dipole). ...</u></em>

I hope I have helped you :D

greetings

atte:

<u>Angela</u>

❤️

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2 years ago