Oh how true.
He could have shown mutants creating clean zones in the oceans, collecting and dissolving plastic into re-usable base components, helping fishes and animals recover, removing oils and fuels (and munitions) from sunken ships at the bottom of the ocean left behind by wars and catastrophies, working with Namor and Atlantis, etc.
And then have them remark while working how they can only do so much by themself, in the areas they are allowed to do so, wishing they could convince the industrial nations to finaly join in aswell and put a stop to the creation of the problem.
Essentialy have the mutants of the nation of Krakoa, put their money where their mouths are again (infact it would also be a good way to show the mutant "civilians" not just sitting around partying all day), while explaining why they can't resolve anything by themself and give a hint at how the real world issue could be solved.
And then in all of this, they could still have a story where Nature Girl, as part of this effort, finds a dead sea turtle at a beach, only to hear a nearby tourist make the "stupid animal" comment (for good measure have others around him clearly uncomfortable about it) and going ballistic at him, while struggeling not to harm him.
In case the killing is supposed to turn out to be manipulation by some other entity (Empath, Mesmero, etc.), show her getting manipulated so the reader knows it's supposed to be an act she would not commit even at her worst, as to maintain her heroic values.
As it stands at the moment it appears clumsely and questionable written and random in it's events and locations.