It depends, there is talk of 'Peak Child' and that the fast population growth that we are experiencing at the moment is starting to come to an end. Certainly in comparison to fifty years ago, the average number of children per family in the world has halved from 5 to 2.5 and fertility is trending downwards.
Hans Rosling does some good talks on the subject, worth a look at, not so long ago he did a piece for the BBCs website:
http://www.bbc.co.uk/news/magazine-24835822
So it's not
all bad news, but it's what we do with it that could make bad news.