The two embedded videos show air traffic worldwide and in the US over 24 hour periods. Viewing these astonishing images tends to leave little doubt about the significant impact human activity is having on the world as a whole; keeping in mind that this happens every day. So many flights!
On another level, it reminds me of watching a colony of ants go about its business? It seems we are not so different from other animals in some ways.
Notice how as the day dawns and progresses in different parts of the world, traffic increases greatly. As night falls, traffic drops off. According to NASA, in the middle of the day in the US, the number of aircraft in the sky peaks at just over 5000!
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