[cratermoon]

There are many crops that can be grown in dry area. Historically corn was an important crop in the desert southwest, as were beans and squash. More recently, amaranth. Also agave and other cactus fruit. If you've never had nopalitos, you're missing out.

In short, lots of food crops that require substantially less water. It's a different form of agriculture.

As for hamburgers: we can quibble over the exact figures, but globally, livestock production is responsible for anywhere from 11% to 19% of annual greenhouse gas production. Given that humanity is not going to go all plant-based suddenly, reducing the footprint of cattle production is imperative. Growing hay and shipping it around the world to feed cow is the opposite of sustainable.

[nicup12345689]

It's going to be ok. Pursue beauty, enjoy life, it is too short. There is no guarantee a meteorite does not crash tomorrow and kills 95% of live beings on Earth. Not sure what you mean by sustainable.

Better worry about pollution, which you know, actually hurts currently living people.