>>262920>At current food and water levels we can hit 10billion with no problems.And what gets us food? Energy, fertilizer, oil, machinery. Water levels are rising. Though maybe you meant just water as a resource. Access to fresh drinking water is a critical problem right now.
We are actually draining entire aquifers. The replenishment rates are in the order of tens of thousands of years of no use. It's not a renewable resource in human perspectives.
Most of it isn't even for humans, we use it to.. grow food.
All these systems impact each other. One crisis will cascade into another. It could start at any point.
Here's an image of satellite data confirming the ground water depletion in India.
http://www2.ucar.edu/atmosnews/research/860/indias-diminishing-groundwater>Bangladesh is likely the world's most intensively irrigated region. It's also home to 600 million people. In a study published in Geophysical Research Letters in August, Swenson and his collaborators found that, between 2002 and 2008, the region depleted groundwater at a rate of around 13 cubic miles (54 cubic kilometers) per year, enough to produce a drop of about 4 inches (10 centimeters) per year in the water table when averaged over the entire region.So, the hopeless optimists say, "we'll just desalinate ocean water". Which costs energy and enormous investments in infrastructure. And massive amounts of extra transport costs. Remember, you can't use ocean water to grow crops. Everything in the supply chain is suddenly more expensive.
Cascading effects. Our resources are limited. We've been using them with no regard for real conservation or renewal. The consequences will hit us hard.
