I know population will decline, but not as a policy. If it happens naturally then it's perfectly ok. The fact that politicians get to decide how many kids or even if you can have kids is a scary thought.
Of course it should. Taking off my shoes when I go through airport security is a pain in the ass but, in the grand scheme of things, a relatively minor inconvenience.
Telling me that I'm not allowed to have a child is a fundamental restriction on my humanity.
The need to save the planet is more important than a person's desire to have kids.
And how are you going to police that in Africa, India, or any Catholic or Muslim country? It's a dumb idea.
Simply removing a tax break at child number 2 would have a substantial impact.