I know this is only a teachers internet forum but a little more nuance and sophistication is needed at times. Birth rates virtually around the globe have been declining for 50 years. In many places now they are below replacement level. Population will stabilise in the not too distant future and then start to decline. If you want to help, reduce your carbon footprint as much as you can and spread the message. Stop trying to shift the blame onto the poor of the world. They have enough to contend with, although life for a great many of them is improving quickly too.