Well, it isn't a plan. Definitely not in the sense of "we plan to do that".

As your screenshot shows, there is a question stated and potential results of actions.

The "news" make this into something with a headline that is factually wrong.
Or do you really think it is the UN plan to triple the inhabitants of the US in the next 40 years? But this is the scenario the headline talks about.
(Which is also proof that it is not an actual plan but a scenario overview - you always have "impossible" models in them)

It is the same as if you would write:
REVEALED: US plan to nuke the whole world!
Because the US has those "plans". But I sincerely hope Trump does not get to see them, he might be the only one who believes they are actual planning and hits the big red button.