Don’t sweat it, no policy needed. As AGW theory manifestly fails to transpire in the real world, more and more you’ll see it morphing into this:
“ahem let’s erm … take a step back and look at the uh more important … wider perspective. *cough* … um, aerosols! yeah yeah we kinda forgot t’ mention those but anyway it’s all SETTLED SCIENCE, see and … see, wut yuh gotta watch out for? AGW actually causes ice ages! And furthermore mmmm let’s clean the plastic out of the oceans…”
And from all that BS and gooblygok the only real thing is yes, there’s too much plastic in the Pacific. Even more than 97% of intelligent people can agree on THAT.