Of course I contribute to all of these things. I do not feel too bad because my parents only had two kids. As far as I can tell, this does not contribute to over-population in the long run. There are other reasons the world is getting worse as well. Rather than explain, I'll try to list them.
Commercialism is out of control.
Baseball players with ads on their uniforms. Star Wars in multiple fast food chains. Safeway club cards. Eight lane freeways with bumper to bumper traffic. Over an hour to get to my house.