The Human Age: The World Shaped by Us Read online

  Geoengineering and adaptation ideas run the gamut from shucks-why-didn’t-I-think-of-that to plain nutty. The monochrome Earth method includes painting cities and roads white, covering the deserts in white plastic, and genetically engineering crops to be a paler color—all to reflect sunlight back into space. Or installing roof tiles that turn white in hot weather, black in cold. More bizarre tech fixes include firing trillions of tiny mirrors into space to form a hundred-thousand-mile sunshade for Earth, or building artificial mini-volcanoes that spew sulfur dioxide particles into the atmosphere to block sunlight. There’s even been a “modest proposal” that we genetically engineer future humans to be tiny so that they’ll need fewer resources.

  At the other end of the globe, on the Norwegian coast, a colossal Carbon Capture Storage facility, owned jointly by Norway and three oil companies, is bagging carbon emissions before they’re released into the atmosphere and storing them in underground vaults. Carbon prisons are still too expensive to be practical everywhere, and not worry-free, but many countries are following suit. In a quest for the first technology that can efficiently, economically pull CO2 out of the air, Richard Branson is offering a tempting prize of $25 million.

  Research by the cell biologist Len Ornstein shows that if the Australian Outback and the Sahara were forested, they’d absorb all of the CO2 we’re pumping into the atmosphere every year. Obviously not an easy venture, it’s technologically possible. Grassroots indigenous, nongovernmental groups have already planted over fifty-one million trees in Africa. In time the forests, absorbing water from the soil and releasing it back into the atmosphere through their leaves, will generate their own clouds, rain, and shade, cooling things down, and providing the bonus of sustainably grown wood for their host countries.

  Meanwhile, the eastern coast of the United States, from Boston to Florida, needs widespread sea barriers, preferably of sand, and also artificial barriers and gates wherever they’re workable. They needn’t be poetic knights of deliverance like London’s. They might even be a version of the natural reefs and oyster beds that once flanked the American coast.

  Trillions of oysters lined the eastern shores, building up knuckle-shelled beds that blunted the storm surges, capturing waves on the reefs, where they collapsed before they could blast down the estuaries. The Hudson River estuary was famed for the quality of its oysters. Oysters closest to shore also filtered the water, which made the habitat ideal for marsh grasses, whose root systems, clinging to the land, kept it from eroding.

  We’ve largely destroyed that long, sweeping natural barricade. Now, as hurricane surges pummel cities and harbors, we’re starting to realize what we’ve lost, not just in small innocent-seeming meals of wild-gathered shellfish but through toxic runoff from cities and farms. And it’s the same the world over—85 percent of the world’s oyster reefs have vanished since the end of the nineteenth century.

  To protect New York City, the landscape architect Kate Orff favors an archipelago of artificial reefs built from piles of “rocks, shells, and fuzzy rope,” to attract oysters, because oyster beds naturally act as wave attenuators. In time, the oyster-encrusted barriers would filter the water and also serve as a kind of ecological glue. “Infrastructure isn’t separate from us, or it shouldn’t be,” Orff explains. “It’s among us, it’s next to us, embedded in our cities and public spaces.”

  BLUE REVOLUTION

  “Mariculture,” I say, floating the image of a vertical ocean garden in my mind, as I climb into a heavy, buoyant, safety-orange worksuit designed for extended periods on cold water.

  “Think of it as 3D farming that uses the entire water column to grow a variety of species,” Bren Smith says, closing his own suit over a black-and-red-checked flannel shirt and jeans, zipping the fish teeth of ankle zippers, and latching the belt. This is just the beginning of his vision for an elaborate network of small, family-owned, organic, and sustainable aquafarms arranged along the East Coast—oysters in beds under curtains of kelp—to help subdue storm surges while also providing food and energy to local communities.

  Climate change is especially hard on fishermen and on farmers. The thirty-nine-year-old seaman sitting across from me in a dinghy on a frostbitten morning in Stony Creek, Connecticut, is both. Bren has a slender build with powerful arms and shoulders, a sign of his rope-heaving, cage-hauling trade. Although he now shaves both face and head, his plumage for years was natural red hair and long beard, hints of which remain. With his flame-orange watch cap, cinnamon five-o’clock shadow, and rusty-blond eyebrows, he is a study in reds, the long wavelengths of visible light.

  We’re not anticipating a stumble overboard, but like many a fisherman Bren doesn’t swim, and the suit adds needed warmth through high winds and snow-thunder in the recent cannonade of winter storms.

  A perennial mariner, he grew up in Petty Harbour, a five-hundred-year-old Newfoundland town with eleven painted wooden houses filled with fisherfolk and a salt-peeled wharf with jostling boats. On the rocky shore, a boy could find lobster cages, floats, anchors, ropes, seaweed-tangled shells, fish and bird skeletons, and tall tales. So it’s not surprising that, at fifteen, he dropped out of high school and ran away to sea. In Maine he worked on lobster boats, in Massachusetts on cod boats, and in Alaska’s Bering Strait on trawlers, longliners, and crab boats. At one point he factory-fished for McDonald’s.

  “Do you think of yourself as a fisherman or a farmer?” I ask.

  “A farmer now. It’s more like growing arugula than facing the dangers of the sea—which, believe me, I’ve seen.”

  In a sense 3D farming is rotational agriculture. Bren harvests kelp in the winter and early spring; red seaweed in June and September; oysters, scallops, and clams year-round; mussels in the spring and fall. At least that’s the theory. Hurricane Irene tore up his oyster beds, which he promptly reseeded, knowing he’d have to wait two more years for harvest. Hurricane Sandy smothered the oyster beds yet again. Clams have a better chance of surviving a hurricane because they at least have a strong foot and can move a little. But oysters really are trapped. They don’t even move to eat or mate. Without the reefs, storm surges churn them up, and as the silt smothers the oysters they die, beginning the slow process of joining the fossil record. Right along with the Model Ts that sank when the Long Island Sound froze over in 1917–1918 and foolhardy souls tried driving across it.

  “Ironically,” Bren says thoughtfully, “I may be one of the first green fishermen to be wiped out by climate change.”

  But Bren is upbeat and confident. Fortunately, he was able to harvest some mussels in the thick of a snowstorm, just before Blizzard Nemo hit. Kelp, at least, is a post-hurricane-season crop. After Sandy he began planting the year’s kelp, and now, in mid-February, it’s nearly ready for harvest.

  Unmooring the dinghy, Bren hops back in, and we motor out to his solar-powered fishing boat, placid as a tiny icebreaker half a mile offshore. En route, we weave through the Thimble Islands, an archipelago of islets, some with majestic cliffs of 600-million-year-old pink granite. Many are topped by stilted, turreted, luxe storybook houses with long wooden staircases winding down to the water.

  A receding glacier left behind this spill of islands: massive granite knobs, stepping-stone slabs, and submarine boulders and ledges, some of which only appear at low tide. Named after wild thimbleberries, not thimble-sized cuteness, the cluster includes Money Island, Little Pumpkin, Cut-in-Two Island, Mother-in-Law Island, Hen Island, and East Stooping Bush Island, among many others—between 100 and 365 (depending on the height of the tide, how you define an island, and if you cherish the idea of an island for each day of the year), with around twenty-three of them inhabited by people during the summer. Harbor seals and birds abound. Each island is cloaked in its own gossip and lore, thanks in part to famous sojourners, from President Taft to Captain Kidd and Ringling Brothers’ Tom Thumb.

  As saltwater and river water mix in the estuary, it offers a feeding and breeding refuge to 170 species of
fish, 1,200 species of invertebrates, and flocks of migratory birds. Horse and Outer islands are wildlife preserves. For Bren it’s a fertile garden visited in summer by flocks of seasonal guests and in winter by tumultuous storms, but always spawning life above and below the surface. Today, in arc-light winter, with a chill wind slicing around the water streets, the garden is icy-blue and glaring, with air that’s clear as a bugle call.

  “The granite cliffs are amazing,” I say, inhaling their feline beauty. Flecked with velvet-black biotite and streaks of cream and gray quartz, in the speckled sunlight, with the boisterous sea slapping at their base, they look more animal than mineral.

  “It’s the same pink granite that helped build the Statue of Liberty,” Bren explains, “and the Lincoln Memorial and the Library of Congress. In Ayn Rand’s The Fountainhead, the architect stands at the edge of a local granite quarry . . .”

  “Full of capitalist machismo, as I recall.”

  “Exactly!” Bren says, blue eyes flashing. “I came here in part to erase that image and that extreme ideology.”

  I know the passage he means, the one in which Howard Roark, clothed only in his grandiosity, stands above the quarry, with all of nature his raw material, something to be devoured by the few powerful men who deserve to rule the world:

  These rocks, he thought, are here for me; waiting for the drill, the dynamite and my voice; waiting to be split, ripped, pounded, reborn; waiting for the shape my hands will give them.

  “I pillaged the seas,” Bren admits in a conscience-stricken voice. “When I look back over my life, I see it as a story of ecological redemption. I was a kid working thirty-hour shifts, fishing around the clock, and I absolutely loved it because I got to be on the open sea. But, you know, we scoured the ocean floor, ripping up whole ecosystems. We fished illegally in protected waters. I’ve personally thrown tens of thousands of dead bycatch back into the sea. It was the worst kind of industrial fishing.”

  There was a time when cod grew large enough to swallow a child. But fishermen have been systematically harvesting the largest fish, and the cod had to mate earlier and at a smaller size to survive as a species. The successful ones passed on their genes. Now a cod will fit on a dinner plate. Soon there will only be small fish in the sea. In the process of reducing them we’ve also remodeled our vision of cod—from a behemoth that could feed a whole family to a small and harmless fish. Even those are vanishing, along with other marine life forms, in one of the greatest mass extinctions ever to befall the planet. For Bren, the whole foraging, hunter-gatherer mentality has led to decades of what he thinks of as a kind of piracy, minus the romance.

  “I went back to Newfoundland once it was clear to me that fishing like that wasn’t sustainable. I loved the sea and I could see the destruction, and I became much more conscious of the ecosystem. After that I went to work on some of the salmon farms, but I saw the same sort of industrial farming. Not good for the environment, and not good for people. Wild fishing and farming fish—neither one was sustainable. The sea was in my soul; I knew I needed to work on the sea. But I was part of a new generation that wanted something different. So how could I evolve into a green fisherman, I wondered?

  “I ended up here in Long Island Sound right at the time there was a movement to bring young fishermen under forty back into the fisheries. They opened up shellfish grounds. You see, it’s very hard to get shellfish grounds because they’re all owned by about six families going back generations. But when they opened up these grounds ten years ago, I came and started aquafarming. I thought, okay, on this sixty-acre plot of ocean, what species can I choose that will do several things to create sustainable food in a good way? And can I think beyond that and actually restore the ocean while we’re farming it, and leave the world better than we started, but also grow great food?

  “Suddenly I found myself growing food in the most efficient, environmentally sustainable way possible—vertically. And it grows quickly. The kelp will grow eight to twelve feet in a five-month period. And the whole food column is nourishing. The oysters, mussels, and scallops provide low-fat protein and all sorts of important vitamins: selenium, zinc, magnesium, iron, B vitamins, omega-3s. We’ve analyzed the sea vegetables—different forms of algae like kelp—and they create lots of vitamins and minerals and nine different amino acids, plus omega-3s. Could you actually have something called ‘ocean vegetarianism’? I think so. During World War II, both the Germans and the British came up with this plan to deal with starvation, which they thought was going to be a huge risk in World War II, and actually they did all these studies and began feeding people algae. There’s also some modern research that if you created a network of small seaweed farms around the world that added up to the size of Washington State, you could feed the whole world. Now, you’re not going to get everyone to eat seaweed, but it shows the potential that’s there.

  “This is Mookie,” he says, as we pull up to his cobalt-blue fishing boat with a sky-blue cabin door and a white deck sole that must once have matched. Thanks to the rubbing of boots, cages, ropes, and splintery dock, a trifle of paint has worn away to reveal a thin deckle-edge of sky blue.

  We climb aboard, hoist anchor, and chug to his patch of ocean, a flowing field dark as gravy. Small gobs of sea spit trail the boat. Gray-and-white herring gulls spiral above, following us as they would any large predator, their yellow eyes hunting for small fish churned up to the surface.

  Dropping anchor, we winch up a heavy cage and swing it carefully onto a built-in wooden bench. The cold breeze, snorting and blowing, is full of turning knives. I’m glad of the heavy worksuit, but it’s cumbersome and my movements feel moonwalk slow.

  Bren pops the lid to reveal a vault of about three hundred oysters and a mix of sea creatures, including starfish, small fronds of orange algae, and a necklace of round off-white periwinkle egg capsules that look like buttons of horn or coral.

  “Look at this,” he says, slicing an egg open with his teeth and extracting tiny seeds on the tip of a knife blade. “They’re snail eggs, and they actually look like miniature snails.”

  Amazingly, they do. Periwinkles, flavorful sea snails, have been part of English, Irish, Asian, and African cuisine for millennia. Clinging to rocks (or oyster cages) to steady themselves, they feed on phytoplankton. But these freeloaders aren’t welcome among the oysters. Nor is the squishy round sea squirt, or the translucent segmented mantis shrimp, or the cascade of olive-green sea grapes, or the broken shells. Back they all return to the sea, except for the mass of tiny open-jawed barnacles encrusting the mesh cages. Those have mortared themselves in place and will have to wait to sink with the oysters.

  Gulls swim through the sky as we pour the oysters into shallow bins on a wooden table. Our job today is to “rough up” the oysters—not injure, but stress them so that they’ll form tougher shells. Much as muscles build if you exercise them, oysters thicken their shells when tossed by the tide. Idle oysters need exercise, just as idle humans do. Without struggle, strength won’t grow. The human parallel plays with my mind; then the cold blows the thought away, and I reach for a pair of rubber gloves.

  “Knead them like bread,” Bren says, showing me how.

  Catching a dozen or so in my open fingers, I roll them forward with the base of my palms, then claw them back gently and repeat the undulating motion. I have become the tide.

  “We touch them every five weeks,” he explains, “to make sure they’ll grow strong.”

  “It sounds like you feel pretty close to them.”

  “They’re like family. I plant them, I’m with them for two years, watch them grow, touch them regularly. I know every oyster personally.”

  “By name?”

  He laughs. “Not quite. Not yet.”

  “They’re really beautiful.” I pause to pick up one of the Thimble Island Salts and look at its deeply cupped shell and golden hue, purple patches, iridescent luster. Some resemble a bony hand, others a craggy mountain range.

  When B
ren opens one with a knife and offers it to me, I can’t refuse. Oyster-proud, he waits for my response. Not an oyster connoisseur, I just let my taste buds speak: “Incredibly salty, silky, smooth, plump as a mitten. It tastes like a bite of ocean.”

  A Proustian memory transports me to the coast of Brittany, in the shadow of Mont Saint-Michel, where people also harvest the sea. There are huge tides there, and the water is very saline—perfect conditions for raising oysters, one of the great delicacies of Brittany. I remember them tasting salty, too, but different, slightly metallic with a whisper of tea and brass. Michel de Montaigne thought oysters tasted like violets. But the flavor of oysters varies depending on their environment, and I’ve read of some that leave an aftertaste of cucumber or melon.

  “Good.” He smiles. “If one doesn’t taste good I feel like a failed father.”

  Returning the roughed-up oysters to their cage, we lower them back into place, swing the boat around, and check on the kelp dangling from black buoys along a hundred-foot line.

  “Walking the line,” Bren says, as he eyes each string of kelp prayer flags, barely visible beneath the cloud-shadowed water. Snagging one up with a red-handled hook, he hoists it out of the water, and I’m surprised to see a long array of curly-edged kelp ribbons, about three inches wide and a yard long, some with faint moiré stripes. Like land plants, kelp photosynthesizes, but not just the leaves, the whole kelp. As a result, it pulls five times more CO2 from the air than land plants do.

  A strand feels surprisingly dry and smooth, and sunlight glows through its golden-brown cheek. A longtime staple in Asian cultures, kelp (and other algae) adds depth to Canadian, British, and Caribbean cuisines. It’s also been harvested for medicinal use since ancient times. Suffused with minerals, more than any other food, it harbors most of those found in human blood and benefits thyroid, hormone, and brain health. It also boasts anticancer, anticoagulant, and antiviral properties. It’s the “secret ingredient” in the posh La Mer line of skin creams, among others. Its alginates are used to thicken everything from pudding and ice cream to toothpaste, even the living cells poured by 3D bioprinters.