13.5 percent of the wordl population do not have enough to eat. Using a small solar or wind powered vacuum pump, we can turn sea or river water int opure water- deal for grop irrigation.
We can use science published in the 18th centruy, to end global hunger or thirst.Pumping waer up under a meter makes it boils – losing all salts and pollutants – turning it into pure water. We can use to irrigate fields and drink.
This will save the world $2 billion annually. For a total cost of 160 million.