The only plus from this approach is that it is using already extracted petroleum products to create energy instead of pulling out new carbon sources from the ground. But like others have said, burning plastics is nasty, and would require a huge proof of concept that the emissions are low and not dangerous. Which I guess they skipped over.
The flaw of the question is assuming there is a clear dividing line between species. Evolutionary change is a continuous process. We only have dividing lines where we see differences in long dead ones in the fossil record, or we see enough differences in living ones. The question has no answer, only a long explanation of how that isn’t how any of this works.