Will we run out of water before fuel?

I think what the TC is referring to is potable water. Sure, water really isn't lost in the entire process of nature. However, if water is sent out into salty oceans, the method of desalinization is very cost-prohibitive, causing more marine pollution, energy consumption, and mineral waste byproduct that is not so good for the environment. In this case, it's possible to lose all potable water in the world causing a worldwide water crisis.