A lot of science is based on samples from ice, core samples, fossils trapped in volcanic flows or ash and obviously some guesswork based on what the earth was like back then. Even if you aren't going to buy into the latest warnings, sea levels rising is real and can't be denied and the ice shields are shrinking by an alarming rate.
Those changes make a big difference each time a major hurricane makes landfall. The temperatures of the ocean, currents changing, it's all going to have a major impact; which is why so many coastal cities have been force to change building codes due to anticipated flooding not seen in the past. Look at a lot of the southern fish species more and more are catching up north, things are changing quickly; man better be capable of quick change too.
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