This was a strange read.

"Just as toxic" reads, obviously, as "as bad as", with the implication that paper is as bad as plastic.

But the article ignores paper entirely and focuses on the use of PLA liners in (some) paper cups and lids.

So, already there is obviously far less potentially toxic material and so already the title is untrue.

Then the article states that there are "as many chemicals" in PLA as regular plastics.

Ok? But what those chemicals are obviously matters?

They say that mosquito larvae were negatively affected by both paper and plastic cups, but not to what degrees.

This, at least as presented, is trash.