For those who don't understand how the earth changes, dramatically, and completely naturally, try to think of the BIG PICTURE.
Think about TIME. Look at the earth, beginning with the first appearance of the dinosaurs and up until today. Now, if we compress all that time into a single 24 hour period, it would look like the following. At 12:01 am the first dinosaurs walked the earth (230 million years ago).
At 5pm, the dinosaurs went extinct (65 million years ago). At 11:57 pm the 1st fully human man was born into the world.
All of the history of man, from the first attempts at writing, and up until today, took place during the LAST 3 SECONDS of our hypothetical 24 hour clock. We, mankind, have been here just 3 short ticks of that clock. No matter how we may FEEL, we are a new species here on earth.
Between the end of the dinosaurs, 65 million years ago, and today, the earth has undergone a dozen or more vast ice ages which were followed by periods of global warming. All of that took place without ANY impact from man. At the end of the most recent ice age, 16,000 B.C. the earth began warming. During that time thousands of species became extinct because they could not adapt quickly enough.
Will man survive ? Who knows? Personally I don't really care. One thing I am certain of, however, is that the earth will continue to undergo dozens of more ice ages followed by warmer periods. Species will evolve and, after a time, become extinct. The universe, including our own solar system, does not care one tiny bit about our petty lives. Cheer up, the next intelligent, sentient, creature may be much better, kinder and more loving than us.