Well, a few thousand years could seam like "forever" - unfortunately there can be way more than one
A 3D render of a previous comic: http://www.notmyearthnotmyproblem.com/2014/10/trashed-ocean.html
Joe Barton has a theory concerning Earth cooling down after all the wind turbines diffuse cooling winds - we created an infographic to help with the complex explanation.
Glaciers? Do you remember reading about them in history class? Icebergs were a clear nuisance, and polar bears are dangerous predators - capable of eating our children, and dogs.