This young man is pro-abortion because he thinks there are too many people on the planet. But he doesn't offer to get rid of himself, just someone else. Why should he have the right to live and why should he decide who doesn't have that right?
As if that faulty thinking is not bad enough, he has been duped by the population-bomb propaganda of the 80's, which is now in disrepute.
I would recommend that this young man read this article in the NY Times.
The world population is now estimated at 7.2 billion. But with current industrial technologies, the Food and Agriculture Organization of the United Nations has estimated that the more than nine billion people expected by 2050 as the population nears its peak could be supported as long as necessary investments in infrastructure and conducive trade, anti-poverty and food security policies are in place. Who knows what will be possible with the technologies of the future? The important message from these rough numbers should be clear. There really is no such thing as a human carrying capacity. We are nothing at all like bacteria in a petri dish.
Isn't that the crux of the question? People are not like bacteria in a petri dish. People are innovative and creative and solve problems. This young man is in favour of eliminating future "problem-solvers" and he thinks he is part of the solution. It seems to me that his lack of creativity is part of the problem.