....The concentrations of CO2 — having never risen above 300 parts per million for at least a million years — have been driven from 280 parts per million at the beginning of the coal boom to 383 parts per million this year.
As a direct result, many scientists are now warning that we are moving closer to several “tipping points” that could — within 10 years — make it impossible for us to avoid irretrievable damage to the planet’s habitability for human civilization.
Just in the last few months, new studies have shown that the north polar ice cap — which helps the planet cool itself — is melting nearly three times faster than the most pessimistic computer models predicted. Unless we take action, summer ice could be completely gone in as little as 35 years. Similarly, at the other end of the planet, near the South Pole, scientists have found new evidence of snow melting in West Antarctica across an area as large as California.
This is not a political issue. This is a moral issue, one that affects the survival of human civilization. It is not a question of left versus right; it is a question of right versus wrong. Put simply, it is wrong to destroy the habitability of our planet and ruin the prospects of every generation that follows ours.
On Sept. 21, 1987, President Ronald Reagan said, “In our obsession with antagonisms of the moment, we often forget how much unites all the members of humanity. Perhaps we need some outside, universal threat to recognize this common bond. I occasionally think how quickly our differences would vanish if we were facing an alien threat from outside this world.”
We — all of us — now face a universal threat. Though it is not from outside this world, it is nevertheless cosmic in scale....
