idk you have some good points there but...
you can make people eat and live cheaper. you can make them drive electric cars and bikes, you can have them grow a farm etc etc.
but you CAN NOT make someone not have kids. in my opinion it will never happen. i know a lot of people that would rather see the earth reach its end, then if they were told they couldn't have children. (sorry about my point of view) but to even a semi-religious person, having kids IS the meaning of life. no kids = no life to be had.
again, i live to have kids, if i don't have kids, i would rather die.
im sorry for my attitude, but i cant stress this enough. (and this isn't pointed directly at you) YOU CAN'T FREAKIN MAKE SOMEONE NOT HAVE KIDS!!!!! ITS THEIR LIFE!!! AND YOU CANT MAKE SOMEONE NON-RELIGIOUS!!!!
So its not an option!!!!
again sorry sorry sorry! i think we CAN make a difference in our life. i mean i don't know about anyone else, but i would be happy to go build a wind turbine for my family's house! it would be awesome! i don't see why everyone doesn't!
my point is, we need to look at ALL the alternatives, and consider them, and choose the most sane approach.