i treid my best to make the sentnce sound good, but its still sounds funny. can you please correct this sentence for me. Thank You so much!

It is not surprising that polar bears in the north are decreasing in population due to glacial deterioration nor the acid precipitation caused by poor industrial production is deteriorating the environment.

2 answers

It'll be far better if you make it two sentences, not all this information crammed into one.

Give it a try. Delete "due to" and start a new sentence there. You'll have to rephrase somewhat.

Let us know what you come up with.
It is not surprising that polar bears in the north are decreasing in population. Notably, glacial deterioration from global warming was a major source. Similarly, acid precipitations caused by poor industrial production also impinged on the environment.

is that better?