Answer:
picky and typical selection.
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Answer:
not enough clean oxygen being produced for us to breathe, loss of habitat for countless species causing them to possibly go extinct.
Yes, it is believed that one of the first Greek ancient astronomers, and the first notable Greek philosopher, was Thales, who lived at the beginning of the 6th Century BCE.
They lower the average density of their body; because of the air it feels like a slight decrease in the weight.
