"We are already reaching upper limits on agricultural and water availability. " Water availability is a big one although hopefully we can at least handle some

"We are already reaching upper limits on agricultural and water availability. " Water availability is a big one although hopefully we can at least handle some of that with clean energy an desal. The economics don't work yet, but water scarcity seems like something that will not stop for economics. Agriculture scarcity - HAH. The only reason we have scarcity is because we consume too much meat, especially in the developed world. If we ate less meat, our spaces dedicated to farm land would feed at least an order of magnitude more people per square meter and would use less water in the process.