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The first priority in those early days had been just to shelter and feed people. The authorities had been prepared to some extent, and heroic efforts to sustain adequate water supplies and sanitation had mostly fended off disease. But food stocks, set aside before the storm, had quickly run down.

The months after the storm, spent trying to secure the first harvests, had been a terrifying, wearying time. Lingering radioactive products in the soil and their working their way into the food chain hadn’t helped. And with all the energy that had been poured into the planet’s natural systems, leaving the atmosphere and oceans sloshing like water in a bathtub, the climate during that first year had been all over the place. In battered London there had been a momentous evacuation from the floodplain of a relentlessly widening Thames into tent cities hastily erected on the South Downs and in the Chilterns.

Because the sunstorm had occurred in the northern hemisphere’s spring, northern continents had suffered most severely; North America, Europe, and Asia had all had their agricultural economies almost wiped out. The continents of the south, recovering more rapidly in the strange season that followed, had led the revival. Africa especially had turned itself into the breadbasket of the world—and those with a sense of history noted the justness that Africa, the continent where humankind was born, was now reaching out to support the younger lands in this time of need.

As hunger cut in, there had been some tense standoffs—but the darkest prestorm fears, of opportunistic wars over lebensraum, or even simple grudge settling, hadn’t come to pass. Instead there had been a generous globewide sharing. Harder heads had begun to speculate, though, about longer-term shifts in geopolitical power.

Once the crisis of the first year was passed, more ambitious recovery programs were initiated. Active measures were taken to promote the recovery of the ozone layer, and to cleanse the air of the worst of the post-sunstorm crud. On land fast-growing trees and topsoil-fixing grasses were planted, and in the oceans iron compounds were injected to stimulate the growth of plankton, the little creatures at the base of the oceanic food chains, and so to accelerate biomass recovery in the seas. Earth was suddenly a planet crawling with engineers.

Bisesa was old enough to remember anguished turn-of-the-century debates about this kind of “geo-engineering,” long before anybody had heard of the sunstorm. Was it moral to apply such massive engineering initiatives to the environment? On a planet of intricately interconnected systems of life and air, water and rock, could we even predict the consequences of what we were doing?

Now the situation had changed. In the wake of the sunstorm, if there was to be a hope of keeping the planet’s still-massive human population alive, there was really little choice but to try to rebuild the living Earth—and now, happily, there was a great deal more wisdom available about how to do it.

Decades of intensive research had paid off in a deep understanding of the working of ecologies. Even a small, limited, and contained ecosystem turned out to be extraordinarily complex, with webs of energy flows and interdependence—networks of who ate whom—complicated enough to baffle the most mathematical mind. Not only that, ecologies were intrinsically chaotic systems. They were prone to crash and bloom of their own accord, even without any outside interference. Fortunately, however, human ingenuity, supplemented by electronic support, had accelerated to the point where it could riddle out even the complexities of nature. You could manage chaos: it just took a lot of processing.

Overall control of the great global eco-rebuilding project had been put in the metaphorical hands of Thales, the only one of the three great artificial minds to have survived the sunstorm. Bisesa was confident that the ecology Thales was building would prove to be durable and long lasting—even if it wasn’t entirely natural, and could never be. It was going to take decades, of course, and even then Earth’s biosphere would recover only a fraction of the diversity it had once enjoyed. But Bisesa hoped she would live to see the opening up of the Arks, and the release of elephants and lions and chimpanzees back into something like the natural conditions they had once enjoyed.

But of all the great recovery projects, the most ambitious and controversial of all was the taming of the weather.

The first stabs at weather control, notably the U.S. military’s attempts to cause destabilizing rainstorms over North Vietnam and Laos in the 1970s, had been based on ignorance, and were so crude you couldn’t even tell if they had worked. What was needed was more subtlety.

The atmosphere and oceans that drove the weather added up to a complex machine powered by colossal amounts of energy from the sun, a machine depending on a multitude of factors including temperature, wind speed, and pressure. And it was chaotic—but that chaotic nature gave it an exquisite sensitivity. Change any one of the controlling parameters, even by a small amount, and you might achieve large effects: the old saw about the butterfly’s wing flap in Brazil setting off a tornado in Texas had some truth.

How to flap that wing to order was a different problem, however. So mirrors were to be launched into Earth’s orbit, much smaller siblings of the shield, to deflect sunlight and adjust temperature. Arrays of turbines whipped up artificial winds. Aircraft vapor trails could be used to block sunlight from selected parts of the Earth’s surface. And so on.

Of course there was plenty of skepticism. Even today, as Eugene described his work, Mikhail said, a bit too loudly, “One man steals a rain cloud; another man’s crops fail through drought! How can you be sure that your tinkering will have no adverse effects?”

“We calculate it all.” Eugene seemed bemused that Mikhail would even raise such points. He tapped his forehead. “Everything is up here.”

Mikhail wasn’t happy. But this had nothing to do with the ethics of weather control, Bisesa saw: Mikhail was jealous, jealous of the contact her daughter had made with Eugene.

Bud put his arm around Mikhail’s shoulders. “Don’t let these youngsters get to you,” he said. “For better or worse they aren’t as we were. I guess the shield taught them that they can think big and get away with it. Anyhow it’s their world! Come on, let’s go find a beer.”

The little group fragmented.

***

Siobhan approached Bisesa. “So Myra has grown up.”

“Oh, yes.”

“I almost feel sorry for the boy—although I don’t think this new breed is in any need of sympathy from the likes of us.” She glanced at Eugene and Myra, tall, handsome, confident. “Bud’s right. We got them through the sunstorm. But everything is different now.”

“But they’re hard, Siobhan,” Bisesa said. “Or at least Myra is. To her the past, the time cut off by the storm, was nothing but one betrayal after another. A father she never knew. A mother who left her at home, and came back crazy. And then the world itself imploded around her. Well, she’s turned her back on it all. She’s not interested in the past, not anymore, because it failed her. But the future is there for her to shape. You see confidence in her. I see a diamond hardness.”

“But that’s how it has to be,” Siobhan said gently. “This is a new future, new challenges, new responsibilities. They, the young ones, will have to take those responsibilities. While we stand aside.”

“And worry about them,” Bisesa said ruefully.

“Oh, yes. We will always do that.”

“I couldn’t bear to lose her,” Bisesa blurted.

Siobhan touched her arm. “You won’t. No matter how far she travels. I know you both well enough for that. Some things are more important even than the future, Bisesa.”