At sometime in my past, I remember reading a science fiction story where the premise was based upon controlling population growth via homosexuality. Only the elite few were allowed to have heterosexual relationships to provide replacement people. Seems that Mr. Denson might have read the same story.
I never cease to be amazed at how stupid so-called experts can be sometimes - I am sure it is the only way they can get media attention. Right now, the latest numbers I have read indicate that population growth has slowed and is expected to peak by the end of this century - primarily due to improved medicine and no need for families to have 10 kids in order to have two or three survive. Also a result of continually improving living standards.
The joke in the electric power industry is that you can get a grant for any kind of research (no matter how ridiculous) as long as you end your description of what you want to study with the words "as it relates to global warming."