They are right that acidification and hypoxia of the oceans that is being caused by pollution are serious problems that we (humankind) need to work at. Look at the problems in the sea of Japan being caused by the massive pollution China is generating and dumping into their rivers.
These scientists are not the hysterics the liberals make them out to be. Very often what is written in the body of the report differs greatly from the soundbite that the first paragraph has. The scientists write that first paragraph because they know future grant money depends upon their cooperation with the statist forces of the grant foundations, corporations, and the governments.
The solutions that can be developed to address the issues may even prove to be more efficient than what we do now, but statists aren't interested in either solutions or ideas.