"A lot," I say.

Theresa giggles.

First thing Thursday morning, I check the CO2 levels in the new yard. Eskimo, one of the old billies, plants his feet wide and shakes his head at me in challenge but the nannies all crowd around me. Theresa sometimes brings handouts and they've all become beggars. She's already fed them, that's her before school chore. I break the litmus pack and stick the indicator on the wall, then I shovel goat manure for waste separation. Martine wants the goat yards as clean as the house, which I suppose is a good idea, but the goats aren't very cooperative.

The CO2 levels are higher than usual. Not life threatening to man or goat by any means, but unusual. I go back to the old goat yard and crack the second pack and stick the indicator on the wall. Lilith follows me around. She's one of the pregnant nannies. She's also my favorite, she's affectionate. I think Martine holds this against her, she said once that Lilith was easy. Nobody could ever accuse Martine of being easy. I pet Lilith, and shoo her out of my way and clean up.

The CO2 levels in the old goat yard are high, too.

I put a sticker in the garden, oddly enough, O2 levels are abnormally high. Of course, the plants are oxygenators but the system takes advantage of that. When Martine said there were problems in the new yard I suspected a leak, even a tiny leak can through a regulator off. But in both goat yards and the garden?

The regulators are simple, like thermostats, really and it seems an unreasonable coincidence that all three would go out at once. Which suggests that there's a problem with our controller. I put a sticker in the kitchen.

"What's that for?" Martine asks.

"All three of the yards are off," I say.

"Is it the programming?" she asks.

"The programming was fine until now," I say, keeping my voice normal. I did the programming to extend the system when we installed the yard. I handle the technical things, it's my half. Martine talks to the goats.

Martine looks at me, clear eyed, direct. "Well, is it the system?" she asks.

"I don't know," I say. "I don't know what it is." If it's the system, we'll have to apply to the commune for a new one. More negative credit. If they have one. If they don't, we have to wait until some are allocated, and we're pulling away from the shipping window. Two years without a system. This holding couldn't go two years without a system, we'd have to close it and then start all over again in two years. Five minutes and I pull the sticker down and throw it in the paper box.

Martine is waiting, arms crossed.

"Too much O2, like the garden. Maybe a leak is throwing everything off."

She opens a drawer and gets out a candle. I shut off the ventilation in the new yard and go out and spend the rest of the morning looking for leaks. Martine is good at finding leaks, she has an instinct, but even a newcomer like me can tell after a couple of hours that I'm not going to find anything. No drafts at any joints, the seams are all straight, no bubbles in the sealer. I turn the ventilation back on and turn it off in the old yard. After that I check the garden, find the cat sleeping on top of the ductwork, which tells us where he goes when we can't find him, but no leaks.

Martine comes out to the garden. "Find anything?" she asks.

"No," I say, "the joints all look fine. I'll check the programming and run some diagnostics."

"Do you think it might be the programming or do you think it's the system?"

I shrug, I don't know.

"Alexi," she says sharply, "we'll deal with it, whatever it is."

Martine and her iron will. Sometimes, an iron will isn't enough.

I go back into the house and jack into the system and set up tests to run. When I jack out Martine is standing there. I'm sitting on the floor next to the panel so I have to look up at her. She's got Martine's intent look. If you don't know her you'd think she was frowning at you.

"The tests have to run," I explain. "It'll be awhile."

"I just came to tell you come eat some lunch." She puts her hand on my shoulder, and I cover it with mine. Uncharacteristic of Martine, that touch. I don't know whether to take it as comfort or an indication of the gravity of the situation.

So we eat lunch, and I go out and clean the filters in the garden. Martine comes out and opens the skylight. Light wind on the surface. Sand shushes softly, the sky is an unnatural cobalt and the sunlight is thin but hard, even with the ultraviolet filtered out. We work through the early afternoon. Martine's bees drone, working the garden with us. We're the only place with screen doors in the whole ridge, but I like the bees. I like the screen doors, too. They're normal, like home on Earth.

At 3:30 the one between the house and the garden slams and Theresa comes in with Linda.

"Hi Little Heart," I say, and realize my mistake too late. She gives me a withering look. It is not appropriate to call an eight-year-old by what she refers to as her 'baby-name' in front of her friends.

"Hello, Comrade Alexi," Linda says politely, "Hello Comrade Martine."

"Dad, can we have lemonade?"

I glance at Martine, who nods. "Okay. Don't do anything with the system, I'm running tests."

"Okay."

Linda started coming over about a year ago and she and Theresa have become 'best friends'. At first I was afraid that the attraction was the fruit juice in the cooler, but I think that the truth is that there just aren't that many children. There are less than 1,500 people in Jerusalem Ridge.

At four I go inside. I can here the girls talking in Theresa's bedroom-although I can't hear what they're saying. I jack in. My diagnostics indicate something is off. Maybe it really just needs reprogramming. I don't care if I screwed up the programming, I can handle that.

Martine has a council meeting so I flash soup and biscuits for dinner. Linda's mother comes by at a little before five, Linda is watching for the scooter and she and Theresa run down to the pulloff.

It is all so normal, so family. What if the problem isn't something I can solve with re-programming? What if our system is shot?

Martine puts on her council meeting outfit, a blouse and slacks. We eat dinner and Theresa tells us about the report she has to write. She has to do a report on one of the leaders of the Second American Revolution. After dinner, she has to be reminded to feed the goats, she does it every evening, but she always has to be reminded. Martine keeps telling me that if I keep reminding her she'll never learn to think for herself. I keep reminding Martine that she's eight years old.

Martine takes our scooter, she has to talk with Aron Fahey about something first, so she leaves early. Theresa and I settle at the kitchen table to do our homework.

She doesn't know whether to do her report on Zhou Xiezhi or Christopher Brin. "Can I use the system now?"

"Go ahead," I say. She calls up an index and I help her pick out sources. Her reading scores are excellent, ahead of her age group. She's still behind in math but her teacher says not to worry, she's catching up. She reads the story of Zhou Xiezhi to me;

Zhou Xiezhi was the son of doctors. When he was a boy, he went to his grandmother's farm. His grandmother had many animals, including a big, pink pig. Zhou Xiezhi liked the pig. Each day, Zhou Xiezhi talked to the pink pig. He fed the pig apples and called the pig 'Old Man.' The pig would make happy noises, grunt, grunt, grunt, and Zhou Xiezhi would laugh and laugh. On New Years Day the family had a big dinner. They had chicken and beef. They had fish because in Chinese the word for 'fish' sounds like the word that means 'more food.' There were dumplings and pork ribs. Zhou Xiezhi ran to wish the pink pig a Happy New Year. But the pig was gone. Where was the pig? His grandmother told him, "The pig was part of the New Year Dinner."