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Showing posts from October, 2016

How can we save the Earth?

The Earth doesn’t need saving. What can hurt the Earth? The Sun can. In a few billion years, the Sun will destroy the Earth. We can start worrying about that in a million years or so. A huge asteroid, say 1000 miles in diameter, could destroy the Earth. Not much we can do about that, so there’s no reason to worry about it.
What about saving life on Earth? Life has existed on Earth for well over 3 billion years. It has survived ice ages, large asteroids, diseases, and everything else that’s been thrown at it – for 3 thousand million years. At present, life exists on land, under the land, in the oceans, and in the air. Life on Earth is not likely to die off until the Sun does it in.
Certainly, some species will go extinct, and some new ones will crop up. This is as it always has been. Over 99% of the species that ever existed are now extinct. This is how nature works. Don’t feel bad: no species cares if they go extinct, except for humans.
So “saving the Earth” mostly means …