Some good ideas, I think you're off on energy and sterilization though. Wind is excellent tech, and sterilization is a fools errand. Too expensive and never very reliable.
I agree with Sterilization. Instead of forcing it, you need to convince people it's the best thing to not have children.
You could say, tax the parents heavily for illegitimate children. Or cut welfare for parents who have children. When people have a financial responsibility for their actions they may rethink them. Of course this is america so the likely result is, parents will just not spend money on their kids and they will go without. Neglect, hunger, etc etc will rise.
When that is found to be the case you sterilize the parents by surgery. Vasectomy for men and tied tubes for women. reversal of either surgery leads the parents and the doctor straight to jail.
Also, max 2 kids per family is necessary. Population needs to grow a little slower.