I saw Shadow of the Moon recently. It is an interesting movie in many respects although overall it was more than a bit disappointing. But there was one thing that really struck me and made me realize how precarious our situation on this planet is.
Astronauts in the movie repeatedly mention the 3 billion people on the planet watching their every move. Three billion? Yes that is right. In the 1960's there were "only" three billion people on the planet. Today there are over 6 billion. The world population doubled in less than a normal lifespan.
Nothing drives it home so clearly than seeing footage you saw before, and events you can remember.
Oh, and before I forget, even back in the 1970's pollution was visible from space. So much for those who think we are too puny to destroy our environment.
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