Technology will move forward, new development takes places daily which will not be stopped, it is human nature to explore.
What is not human nature is walking around with blinkers on, the lack of food and water resources should stop anyone in their tracks before considering bringing more children into an over-burdened world.
Children do not owe the parents anything in their old age, where does this notion come from that one must not prepare for your own old age. Children face many different obstacles on life's path, I know many beliefs support the idea/notion that children must look after their aged parents.
Looking around at my own situation, a country with the highest number of youth in the world, the highest unemployment, crime is rampant, when do people take account of themselves?
Long term solutions need to be sought after, assisting where we are able never makes the problem go away, one child going to bed hungry is one child too many!