Too many people

Interesting documentary on recently, by Sir David Attenborough, about the growth of human population and it's impact on the earth.
I couldn't agree more, there are too many people on this planet to live sustainably.  At the rate we're growing there won't be much left for the human race to use and enjoy - water, land, biodiversity.  This is my main reason for not having my own children, and it is a hard topic to bring up with all my friends and family who want the enjoyment of spawning and raising their own kids.

My question to them is, do you want to bring children into this dying world, especially when your having a family makes such an impact?  Harsh I know, which is why I've never asked one of them this question directly.
Their answer may be, why do I have to forfeit having kids to save the earth, when there are so many people in third world countries having large families?  Shouldn't they abstain?
Every person has the right to have their own child, it is the most natural thing on earth so why should someone be denied the right.

As Sir David pointed out, education is the key. The underprivileged should be given access to education and to basic medical facilities, to improve their knowledge and reduce birth rates.  Absolutely, every person should also have this right.

But I do not believe this will solve the issue. The rate of consumption in the rich countries is appalling, and could be better utilised. However the more people with access to consumerist society, the increase in use of our natural resources.  There are too many rich people in this world, this is the problem

Sometimes I get mad, although I am not maternal I have given up the pleasure of having kids to reduce the human population, and put my life's work into improving our environmental impact, but not for myself, for the greater good of people and all those that do get to enjoy raising children, and their children and so on.  Yet these people who will benefit from my actions, do they care?