How many kids should we have?

Last October I had a post about environmentalism and how there are two major views, one being that we should be cautious on using up the earth's resources, and one that the world was designed by God to have enough resources till the end of the present age. I mentioned in the post that

1) Humans are not parasites. Some of the more extreme environmentalists - not the norm - would be happy if most of the population was wiped out, due to consumption of natural resources. I will say that I do not believe overpopulation is a problem. Granted, one should not have more kids than they can feed, but God says "be fruitful and multiply" and He does so without qualification. Yes, the "subdue the earth" is without qualification as well, but we subdue the earth for resources, and one can argue that these resources are limited, so we do not subdue it as much. The point is, "subdue the earth" is open to more interpretation; "be fruitful and multiply" is less so. Anyway, humans should never, ever be seen as a liability, and I believe that any measure to discourage population growth encourages this viewpoint.

I don't simply want to nag on a point, but this is something that has been on my mind, and there was an interesting discussion primarily between Dan and I on the population issue. I had mentioned that people who have many kids tend to be less materialistic, but I just wanted to reiterate that I don't think the converse statement is necessarily true: that people who have fewer kids are more materialistic. I'm saying that previous sentence is not necessarily true.

I still stand by my belief that as long as we can afford to feed our kids, it is okay to have as many as we want. Dan argued that this should apply to a global scale as well, because globally we are supposed to be running out of resources, and that we should consider the amount of children in light of those issues. I don't know how to answer that, as I have little knowledge of sustainability issues. However, I still don't believe people who choose to have 5 or 6 kids are doing anything wrong. As I said previously, God said to "be fruitful and multiply", and He was addressing humanity in general. If God came to me directly and said "Hey Chance, be fruitful and multiply", I would have at least 3 kids. (I am not saying everyone should have more than 2 kids, because I think God's command in Genesis was to humanity in general, and I don't think people are sinning for not having children.) Psalms says that

4 Like arrows in the hands of a warrior
are sons born in one's youth.

5 Blessed is the man
whose quiver is full of them.
They will not be put to shame
when they contend with their enemies in the gate.

Anyway, as I said, I don't have any logical argument against the overpopulation issue, I just don't think that people are doing anything wrong than having X number of kids. I have a coworker who has 5 children; I don't think he is sinning. Also, he has to continually make material sacrifices because of his 5 kids. He's not the type of person environmentalists have to worry about. Care for the environment and our resources is noble, but I'm afraid it can cause us to look at human beings as nothing more than consumers of natural resources.

I suppose this hits home for me because I have my first child on the way. To me, she is more than just a consumer of natural resources. If I want 7 more (which I don't) then I'm going to have them.