> Nearly all the plastic humans have made still exists.

And it just doesn't matter. It's a tiny amount of mass / volume.

> The great garbage patch in the Pacific is growing fast.

Ocean plastics are almost entirely a consequence of (particularly Indonesian) fishing net waste, not Western consumer products disposed of in managed landfills. The "great garbage patch" is also very much overstating the scale of the problem; it's a slightly higher plastic density region of ocean.