“Alas, yes. That’s our carbon sink these days. Earth’s lungs, if you like. It performs the job once done by forests and grasslands. The surface vegetation is not what it used to be, so Govcentral introduced the algae to prevent us from suffocating ourselves. Actually, it’s a far more successful example of terraforming than Mars. Though I would never be so undiplomatic as to say that to a Lunar citizen. We now have less carbon dioxide in our atmosphere than at any time in the last eight hundred years. You’ll be breathing remarkably clean air when you arrive.”
“So why do you all live in the arcologies?” Louise asked.
“Heat,” Aubry said sadly. “Do you know how much heat a modern industrial civilization of over forty billion people generates?” He gestured down at the globe. “That much. Enough to melt the polar ice and quicken the clouds. We’ve taken all the preventative measures we can, of course. That was the original spur to build the orbital towers, to prevent spaceplanes aerobraking and shedding even more heat into the air. But however economic we are, we can’t dissipate it at a rate that’ll turn the clock back. The old ocean currents have shut down, there’s no ozone layer at all. And that kind of ecological retro-engineering is beyond even our ability. We’re stuck with the current environment, unfortunately.”
“Is it very bad?” Genevieve asked. What he’d described sounded worse than the beyond, though she thought the man didn’t sound terribly upset by the cataclysm.
He smiled fondly at the planet. “Best damn world in the Confederation. Though I expect everyone says that about their homeworld. Am I right?”
“I like Norfolk,” Louise said.
“Of course you do. But if I might make an observation, this is going to be noisier than anything you’ve experienced before.”
“I know that.”
“Good. Take care down there. People aren’t likely to help you. That’s our culture, you see.”
Louise gave him a sideways look. “Do you mean they don’t like foreigners?”
“Oh no. Nothing like that. It’s not racism. Not overtly, anyway. On Earth everybody is a foreigner to their neighbour. It’s because we’re all squashed up so tight. Privacy is a cherished commodity. In public places, people don’t chat to strangers, they avoid eye contact. It’s because that’s the way they want to be treated. I’m really breaking taboos by talking to you. I doubt any of the other passengers will. But I’ve been outsystem myself, I know how strange it all is for you.”
“Nobody’s going to talk to us?” Genevieve asked apprehensively.
“Not as readily as I.”
“That’s fine with me,” Louise said. She couldn’t quite bring herself to trust Aubry Earle. At the back of her mind was the worry that he would volunteer to become their guide. It had been bad enough in Norwich when she’d depended on Aunt Celina; Roberto was family. Earle was a stranger, one prepared to drop Earth’s customs in public when it suited him. She gave him a detached smile, and led an unprotesting Gen away from the window. The lift capsule had ten decks, and her standard-class ticket allowed her into four of them. They managed to avoid Earle for the rest of the flight. Though she realized he was telling the truth about privacy. Nobody else talked to them.
The isolation might have been safer, but it made the ten hour trip incredibly boring. They spent a long time watching the view through the window as Earth grew larger, and talking idly. Louise even managed to sleep for the last three hours, curling up in one of the big chairs.
She woke to Gen shaking her shoulder. “They just announced we’re about to reach the atmosphere,” her sister said.
Louise combed some strands of hair from her face, and sat up. Other passengers who’d been dozing were now stirring themselves. She took the hair clip off as she reorganized her mane, then fastened it up again. First priority when they were down must be to get it washed. The last time she’d managed properly was back on Phobos. Maybe it was time for a cut, a short style that was more manageable. Though the usual arguments still applied: she’d invested so much time keeping it in condition, cutting it was almost a confession of defeat. Of course, back at Cricklade she’d had the time to groom herself every day, and had a maid to help.
Whatever did I do all day back then?
“Louise?” Genevieve asked cautiously.
She raised an eyebrow at the girl’s tone. “What?”
“Promise you won’t get mad if I ask?”
“I won’t get mad.”
“It’s just that you haven’t said yet.”
“Said what?”
“Where we’re going after we touch down.”
“Oh.” Louise was completely stumped. She hadn’t even thought about their destination. Getting away from High York and Brent Roi had been her absolute priority. What she needed to do was find somewhere to stay so she could think about what to do next. And without consulting her block there was really only one city name from her ethnic history classes which she was certain would still exist. “London,” she told Genevieve. “We’re going to London.”
The African orbital tower had been the first to be built, a technological achievement declared the equal of the FTL drive by the Govcentral committees and politicians who’d authorized it. Typical self-aggrandising hyperbole, but acknowledged to be a reasonable comparison none the less. As Aubry Earle had said, it was intended to replace spaceplanes and the enormously detrimental effect they were having on Earth’s distressed atmosphere. By 2180 when the tower was finally commissioned (eight years late), the Great Dispersal was in full swing, and the volume of spaceplane traffic had become so injurious to the atmosphere that meteorologists were worrying about elevating the armada storms to an even greater level of ferocity.
The question became academic. Once the tower was on line, its cargo capacity exceeded thirty per cent of the world’s spaceplane fleet. Upgrades were being planned before the first lift capsule ran all the way up to Skyhigh Kijabe. Four hundred and thirty years later, the original slender tower of monocarbon fibre was now nothing more than a support element threading up the centre of the African Tower. A thick grey pillar dwindling off up to infinity, immune to the most punishing winds the armada storms could fling at it. The outer surface was lined with forty-seven magnetic rails, the structure’s maximum. It was now cheaper to build new towers than expand it any further.
The lower five kilometres were the fattest section, providing an outer sheath of tunnels to protect the lift capsules from the winds, enabling the tower to remain operational in all but the absolutely worst weather conditions. Exactly where the tower ended and the Mount Kenya station started was no longer certain. With a daily cargo throughput potential of two hundred thousand tonnes, and up to seventy-five thousand passengers, the capsule handling infrastructure had moulded itself tumescently around the base, a mountain in its own right. Eighty vac-train tunnels intersected in the bedrock underneath it, making it the most important transport nucleus on the continent.
To keep the passengers flowing smoothly, there were eighteen separate arrival Halls. All of them followed the same basic layout, a long marble-floored concourse with the exit doors from customs and immigration rooms on one side, and lifts on the other, leading to the subterranean vac-train platforms. Even if an arriving passenger knew exactly which lift cluster they wanted, they first had to negotiate a formidable barricade of retail stalls selling everything from socks to luxury apartments. Keeping track of one individual (or a pair) amid the perpetual scrum occupying the floor wasn’t easy, not even with modern equipment.
B7 left nothing to chance. A hundred and twenty GSDI field operatives had been pulled off their current assignments to provide saturation coverage. Fifty were allocated to Hall Nine, where the Kavanagh sisters were due to disembark, their movements coordinated by an AI that was hooked into every security sensor in the building. Another fifty were already on their way to London within minutes of Louise saying that was her intended goal. Twenty had been held in reserve in case of cockups, misdirection, or good old fashioned acts of God.