Population is not being ignored but there are limits to what can be done about those increases.  Projections indicated that it will be many decades before there is stabilization and decline but as with most problems we have at most a few decades before thing start to get bad.
There is a relation Impact=Population X Affluence X Technology.  We can control technology which is the suggestion I have had here so that T become less than 1 so increasing population and affluence do not need to have greater impact. We know the answer but the problem is the right people having the knowledge and the will.