6.5 billion people on earth is too many people. in 2050 when the population hits 9 or 10 billion we will be in even worse shape. The other problems we have from undrinkable water to global warming is due to how many of us are here taking up space and using resources. Population is humanity's biggest problem - solve that the rest becomes more manageable.
Hm, I beg to disagree slightly... There seems to be less real lack of ressources on this planet, but rather a very, very bad management on most of the planet. It is very well true that in some regions the land can't support the local population, but it is certainly unlikely the Earth has reached its limits of human population.
Not only are wast areas of North and South America and Russia criminally underpopulated, but with modern recycling and purification technologies it is possible to make life pleasant and healthy even in totally overcrowded areas. If people would cease eating dead animals, the amount of vegetarian food would suffice for a much larger population than what we have now. Much of the environmental pollution is caused by all those pig farms and cattle farms. You can count how much biomass is attributed to all those vertivrates designated to land on the dish, and calculate how many people could be afforded if humanity gave up its carnivory lifestyle.
Anothere shortage in food supply seems to come near us by the insane plans of using sugsr cane, mais and oil for production of ethanol and "bio-diesel". If people in poor countries will be forced to compete with cars in rich counties, there will be a next starwation well, caused wilfully and artificially.
In principle, population control is a good thing, thince every system has its maximum load. I am solely not convinced that humanity actually has reached that point. Urban life indeed might demand more energy and technology, but neither energy nor technologie are not limited goods. With energy, drinkable water and food can be produced in significant amounts. Instead of reducing the population, we can slightly change our habits - e.g. using public transportation and bikes in urban centers is a most reasonable proposal.
For our own purposes, the biological procreation might or might not constitute a problem, in future. Since Gays do not "get" children unintentionally (what is mostly the case eith straights), there is always a purposefull action necessary for getting children. Should "breeding" ever become a problem or be unwanted from political reasons in the Gays country, this behaviour might be most effectively targeted by liability life support and education costs etc. A criminal persecution, for such a reason is quite unimaginable.