If we look at mankind as a whole as one system forgetting about national boundaries forgetting about political lines.... The Civil engineering task set before us is truly immense. As an example let's use pumping mechanics.
You have a need for so many gallons of water per hour and so you fit a pump properly sized to supply it. You would think that if you needed twice as much you would only have to increase the pump by the same amount.... But that's not the case. The increase in the needed power is exponential. So where you needed a one horsepower pump originally you now need a four or five horsepower pump for a simple doubling of demand. I suspect we face the same situation on a global scale.
What we are seeing is actually the exponential increase in maintenance demand for the population. The point is we've never been where we are now and we hardly know what to expect. One thing is for damn sure It's not a linear increase.