I am open to the idea of eugenics. I think in all honesty every sensible human is open to the concept except religious fanatics. Just look at the possibilities science offers people and how people welcome them. Doctors are now able to foresee many deficits during and even before pregnancy and it should come as no surprise that most parents do want healthy children. The ability to foresee problems and terminate pregnancy at an early stage is advancing, you can also get your sperm checked etc. As long as abortion is legal the human race will (slowly) progress in the right direction there.
Of course this process could be sped up if some dictator came to power and forced people to have abortions, be sterilized and whatever you can imagine. But are you willing to simply hand that power over to someone? If you are then you deserve to be cut from the population yourself as far as I'm concerned. Seeing as you're willing to sacrifice whatever freedom you have over your own life for a mere promise of a better future, you probably would be a very dumb and insecure creature.
You want this for yourself and your children? Then do it yourself, don't hope for a strong leader who will make these decisions for you. All that power could so easily be used for completely different ends. Can you think of any living politician right now that you would trust with a task like this? I can't, hence my stance on this. I think it's better to grow a strong family tree and hope to positively influence human kind. Improve the world by improving yourself and don't let losers get you down.
Also with regards to global pollution I think this plan would only work if every nation on earth started doing it. Since that will never happen I fear the simple application of this concept (round people up and shoot them) would never work. You'd even risk getting into a civil war and your country would be weakened and easily overtaken by outside forces (most likely UN in this case)
I'd rather support more positive solutions to getting a better society, even if they take longer and are more frustrating. The death penalty for the worst criminals and the corrupt officials is something I advocate outside of the eugenics issue.
Anyway, I thought this was a troll thread?