Thanks for your inquiry. Pope Francis will address the UN this September on the environment and world overpopulation.
This will be a historic first, so be ready. Sources may be found at http://www.theguardian.com/world/catholicism
or Google Pope Francis addresses the UN
PS I’m a concerned Catholic.
A message from Medjugorie 2 July 2015
To those who do not believe, who do not know, who do not want to know but for that you must pray a lot for the gift of love, because love is the mark of true faith and you will be apostles of my love.
There is no problem with overpopulation. Maybe that’s what he wants to tell them.