The Earth isn't overpopulated, our vital resources are just diminishing. If we learn how to properly manage/produce those then we're golden.
Resources. (also works for water) http://en.wikipedia.org/wiki/Asteroid_mining
In 1997 it was speculated that a relatively small metallic asteroid with a diameter of 1.6 km (0.99 mi) contains more than $20 trillion USD worth of industrial and precious metals. A comparatively small M-type asteroid with a mean diameter of 1 kilometre (0.62 mi) could contain more than two billion metric tons of iron–nickel ore, or two to three times the annual production of 2004. The asteroid 16 Psyche is believed to contain 1.7×1019 kg of nickel–iron, which could supply the world production requirement for several million years. A small portion of the extracted material would also be precious metals.
Advantages of Vertical Farming
Year-round crop production; 1 indoor acre is equivalent to 4-6 outdoor acres or more, depending upon the crop (e.g., strawberries: 1 indoor acre = 30 outdoor acres)
No weather-related crop failures due to droughts, floods, pests
All VF food is grown organically: no herbicides, pesticides, or fertilizers
VF virtually eliminates agricultural runoff by recycling black water
VF returns farmland to nature, restoring ecosystem functions and services
VF greatly reduces the incidence of many infectious diseases that are acquired at the agricultural interface
VF converts black and gray water into potable water by collecting the water of
VF adds energy back to the grid via methane generation from composting non-edible
parts of plants and animals
VF dramatically reduces fossil fuel use (no tractors, plows, shipping.)
VF converts abandoned urban properties into food production centers
VF creates sustainable environments for urban centers
VF creates new employment opportunities
We cannot go to the moon, Mars, or beyond without first learning to farm indoors on
VF may prove to be useful for integrating into refugee camps
VF offers the promise of measurable economic improvement for tropical and subtropical
LDCs. If this should prove to be the case, then VF may be a catalyst in helping to reduce or even reverse the population growth of LDCs as they adopt urban agriculture as a strategy for sustainable food production.
VF could reduce the incidence of armed conflict over natural resources, such as water
and land for agriculture
The current problem is not overpopulation at all, its horrid planing and no idea how to deal with such populations.
Huge waste, little re usability, little recycling too much energy put into things that dont matter and too little on the ones that do.
We can improve a lot just by general education and if education fails due to lack of good will, through legal enforcement.
So many ways, so many ideas, so few are used due to bureaucracies, conflicts of interest and monetary values
The ideal population would be 7028490115
Just because I say so
I'd say 5 billion would be perfect.
Why? Because it's about how much we had in 1990's. And current population is way too big in many areas.
I'm not even talking resource wise now, talking about space, how crowded some areas are etc.
I think a healthy population that can sustain itself would be 1 billion.
Right now we might have a minor inconveniences with crazy weather but it will get worse. And hoping for a climate cycle to go back to normal is not the proper way to look at things. Two things need to happen. Population control and we need to rely more on renewal energies. If you look at birthrates around the world, some of the most stable and prosperous nations and economies have close to 1 child per family. Things usually worsen for income disparity, uneducated women and children, poverty, pollution as the birth rates rise.
With the energy to quicker we can move on to renewables the quicker our atmosphere can recover which would mean the planet could safely support more people
Certain regions are overpopulated perhaps. Like China and India. But take a look at Siberia, plenty of room over there.
Or do you mean that there are only a certain number of resources? Well, we can always find more. Can you imagine how much of the planet we're overlooking? How much oil, minerals, etc are still waiting to be found by us? And what about food production & consumption? We can definitely improve on that if we're taking a more effective approach. By the time all Earth's minerals have been spent we could probably start harvesting asteroids in space.
The only problem we have for now, is a big difference between rich and poor. And along with the good aspects of globalization come the negative aspects.
Now more than ever are the poor willing to become as rich as the west. But it can't be done in such a short amount of time, we don't have the resources for it (now).
That's the only real problem we have for now. It's a negative side-effect of the exponentially increasing science discoveries in the world. Everyone wants in on it. Our global population isn't compatible with our pace. Either we reduce it, we maintain big differences between rich and poor (which can very well result in war) or we take a scientific leap ahead and get our resources elsewhere.
I guess we'll probably end up somewhere in the middle of all of those options.
I read a article on slashdot at one time that said the earth could easily support 10billion. We would have plenty of resources for eternity if we were not so wasteful, just look at phones and how much precious materials go into those and we just throw them away every year or so. Look up planed obsolescence which is a big problem.
There is no set number as it would depend on the level of technological advancement. Also, the planet is NOT overpopulated currently.
And I looked, and behold a pale horse: and his name that sat on him was Death, and Hell followed with him.