Smallholder farmers could have a greenhouse-in-a-box
Greywater recycling could be used
Microbial fungus on seeds could restore carbon in soil, promote plant growth, and grow with less water
"Supercrops" / "green revolution" crops could use less irrigation / pesticides and suck nitrogen / carbon out of the air
Treated sewage could provide water
Terraces could be good for climate adaptation / droughts / preventing fires / landslides
Groundwater could be replenished
Enset could be a drought-resistant crop
Trees could be watered by citizens
National water pipelines / aqueducts could be built
Cloud seeding could cause rain to reduce temperatures and cause rain
California could regulate groundwater and create water markets
Almonds, beef, dairy, pistachios, and other water intensive agriculture could be produced in water rich areas
Water wars could be solved
California's water laws could support small farmers during drought
Quinoa, millet, sorghum, fonio, barley, oat, sweet potato, other crops, etc. could better ease malnutrition, water availability, and hunger in developing countries
Ice stupas could provide irrigation and mitigate climate change
Water could be provided to wild animals during droughts
Drought remedy