“Fire left,” instructs Pederson. Mistry flips a switch on the center console and deploys a flare on the left wing. “Fire right.” There are 24 cylinders resembling sticks of dynamite wired to racks on the plane’s wings, 12 on each. The flares are filled with combustible sodium chloride—pulverized table salt mixed with a flammable potassium powder. When the switch is flipped, the end of the flare shoots orange fire and trillions of superfine salt particles are released into the cloud. Water molecules are attracted to salt, so they bond to the particles and coalesce into raindrops. ... During our mission over Maharashtra, we have cooperative clouds. Twenty-two minutes after seeding the first cloud, Pederson returns to the location where he fired that initial flare. It’s pouring. “We’ve got drops!” he shouts. He dips the King Air into a victory swoop before gunning over to another cluster of clouds. My stomach churns, and I can’t hold it in any longer; I heave into my purse. Pederson doesn’t notice. The computer barks out another warning about excessive banking. He laughs and says, “Shove it, Betty.” ... Cloud seeding has been controversial since it was invented by Vincent Schaefer in 1946. A chemist for General Electric, Schaefer made the first snowstorm in a laboratory freezer. The media predicted that cloud seeding could perform miracles, from dousing forest fires to ensuring white Christmases. But doubts quickly arose about the impact of meddling with nature. Concerns that cloud seeding might “steal” water from an area a cloud is traveling toward—robbing Peter to water Paul, as it were—have been dispelled. Storm clouds continually regenerate and release only a portion of their moisture when they rain, which means you can’t “wring out” all the moisture from one cloud.

There was no future, no jobs, said my companion. Corruption flourishes, he went on, so-called tenderpreneurs thrived, a breed who use inside knowledge to make a mockery of the tender process, inflating costs while lowering standards. ... A teacher-turned-trader, part-time entrepreneur and occasional taxi-driver, he owns a plot on which he grows maize — although not for his family: the crop is sent to relatives in the countryside. Reversing the traditional direction of trade, workers in the city are now feeding the farmers. The drought, the worst for three decades and embracing much of southern Africa, is taking its toll. ... Zimbabwe is far from “dead”. The country is free of religious divisions — although cursed by ethnic and clan tensions — and still has supportive neighbours, a battered but surviving infrastructure, a broad English-speaking skills base and a talented diaspora longing to return home. And above all, the military are still — for now — in the barracks.

Dead grass became a point of pride as state officials rolled out ad campaigns with slogans like “brown is the new green” and “going golden this summer.” With-it wealthier residents signaled their savvy by investing in beautiful, though dusty, re-landscaped eco-havens of olive trees, white-flowered chamise shrubs, and California golden violets with, perhaps, paths of decomposed granite wending through them. ... Turf Terminators, started by twentysomething entrepreneurs, pitched itself to people like Goldfarb who wanted to conserve but couldn’t afford to pay a landscape architect four or five figures. In less than two years, the company removed 16 million square feet of grass from 12,000 lawns. During that time, Turf Terminators was the veritable face of water-saving landscaping in and around Los Angeles, praised by government officials and some customers for providing a fast, affordable way to get rid of grass. ... The company’s short but profitable life span serves as an instructional fable for other cities that will inevitably face climate change-related infrastructure problems. The takeaway: Solutions are rarely simple or easy, so do a lot of research before throwing public money at the issues.

If water is not managed better, today’s crisis will become a catastrophe. By the middle of the century more than half of the planet will live in areas of “water stress”, where supplies cannot sustainably meet demand. ... Where water is available, when and in what condition matters hugely. About 97% of the water on earth is salty; the rest is replenished through seasonal rainfall or is stored in underground wells known as aquifers. Humans, who once settled where water was plentiful, are now inclined to shift around to places that are less well endowed, pulled by other economic forces. ... As people get richer, they use more water. They also “consume” more of it, which means using it in such a way that it is not quickly returned to the source from which it was extracted. ... To make matters worse, few places price water properly. Usually, it is artificially cheap, because politicians are scared to charge much for something essential that falls from the sky. This means that consumers have little incentive to conserve it and investors have little incentive to build pipes and other infrastructure to bring it to where it is needed most. ... around a fifth of the world’s aquifers are over-exploited. This jeopardises future use by causing contamination. It also damages the layers of sand and clay that make up aquifers, thereby reducing their capacity to be replenished. ... People do not drink much water—only a few litres a day. But putting food on their tables requires floods of the stuff. Growing 1kg of wheat takes 1,250 litres of water; fattening a cow to produce the same weight of beef involves 12 times more. Overall, agriculture accounts for more than 70% of global freshwater withdrawals. ... estimated that agricultural production will have to rise by 60% to fill the world’s bellies. This will put water supplies under huge strain. ... Hydrologists expect that a warming climate will see the cycle of evaporation, condensation and precipitation speed up. ... There is no single solution for the world’s water crisis. But cutting back on use, improving the efficiency of that use and sharing out water more effectively would all help.