But there's no question about historical change. Up to about 12000 years ago, the Griff homestead was entirely covered in glacier and sea levels were much lower than they are now:
The last retreat of glaciers from Canada was 5000 years ago; on a geologic scale, the [surface of the] earth has been warming; this is a natural cycle. Earlier glaciers went even further south.
The matter at hand is that some recently measured increases are at a faster rate than the natural rate, and being faster, may cause additional problems for children and other living things.