Okay. Can your body sustain itself on prickly pear cactus and algae, whether or not it is genetically tinkered with, indefinitely without getting malnourished and you dying?

Cactus is also very slow growing. Can you feed 8 billion people on cactus and algae?

Don't you think large scale cactus farming or algae farming will require fossil fuels?

Cactus only grows in one climate. How are you going to transport it to everyone else?

Algae grows in water. As you pointed out, reliable water, thanks to reliable weather, is disappearing. What's your miracle techology that'll save algae harvests then?

I'll say it again. There is no getting around the fact that civilization has been built on a finite energy resource that we have wasted. Technology can mitigate the collapse somewhat, but it won't stop it. When the energy goes, so do we.

The ONLY thing ga that could potentially save us is to start drawing down our populations, stop wasting our energy we have left, step back voluntarily from convenience and industrialization, stay away from nuclear, start cleaning up the planet of the pollution we've created, start heavily investing in passive sustainable energy sources. We might survice long term then as a species, *if* we make it past the bottleneck. Regardless, there is no moving forward without collapse.