Over population is a very real problem and its only being noticed now because it will soon be hurting human beings, its been hurting other animals dramatically for a hundred years.
Have you noticed the people that want to have children and have lots of them are always the people that shouldn't have been allowed to have any in the first place? Stopping these people from having children would be great but how could you do it?
It would be great if a laser beam was invented that could render people infertile without them noticing, they would just assume their attempts at pregnancy didn't work and they would eventually die and their gene line would be finished. That would be excellent, then you would need to decide who gets zapped, realistically I would have to say poor people, they breed like rabbits and their offspring breed at younger ages and so more population comes from the poor than any other class of citizen. Politically incorrect yeah but long term benefits for the planet definately. Which is more important?
What are neutron bombs? I'm assuming they would kill animals so dropping them on africa would be terrible, to lose the plethera of species in africa would be a catastrophic disaster to anyone with their head on straight, and besides, whats so bad about HIV? It only kills human beings, thats bad? Sorry, what are we talking about again?
Seriously, let that shit spread before man defies nature again by discovering yet another cure.
Notice how most countries are civilised and populated by people over most of their space and then little pockets are reserved for nature? If you ask me, in a perfect world, it would be the other way around. Humans should take up as little space as possible because we are new to this planet and all this space we take up was actually the homes for many different creatures for millions of years before we got here.
Hopefully in the future there will be small human reserves and the rest of each country will be given back to nature. To do this population numbers need to be decreased dramatically.
After reducing our population, there would be billions of happy, healthy, wealthy people living on a thriving earth.
Billions? That's just setting us up for the very same problem in the near future, I'd say hundreds of thousands is more reasonable in order for the earh to thrive, maybe a couple of million at most.