In general, governments and companies can take that step more easily than individuals can. “Over the past seven years,” Cortese explains, “DuPont has made investments that have reduced its greenhouse gas emissions by 72 percent over 1990 levels. They’ve saved $2 billion.” The Pentagon is determined to cut its energy use by a third, both to save money and to reduce its dependence on risky foreign oil supplies.
Myth 1: Nobody knows what sustainability really means. That’s not even close to being true. By all accounts, the modern sense of the word entered the lexicon in 1987 with the publication of Our Common Future, by the United Nations World Commission on Environment and Development (also known as the Brundtland commission after its chair, Norwegian diplomat Gro Harlem Brundtland). That report defined sustainable development as “development that meets the needs of the present without compromising the ability of future generations to meet their own needs.” Or, in the words of countless kindergarten teachers, “Don’t take more than your share.” Note that the definition says nothing about protecting the environment, even though the words “sustainable” and “sustainability” issue mostly from the mouths of environmentalists. That point leads to the second myth…
A related but separate myth is….
Myth 3: “Sustainable” is a synonym for “green.” Although there’s a fair amount of overlap between the terms, “green” usually suggests a preference for the natural over the artificial. With some six billion people on the planet today, and another three billion expected by the middle of the century, society cannot hope to give them a comfortable standard of living without a heavy dependence on technology. Electric cars, wind turbines and solar cells are the antithesis of natural—but they allow people to get around, warm their houses and cook their food with renewable resources (or at least, a much smaller input of nonrenewables) while emitting fewer noxious chemicals. It’s probably more difficult to see nuclear power as sustainable. Unlike the other alternative energy sources, it has long been anathema to environmentalists, largely because of the problem of storing radioactive waste. But nuclear reactors are also a highly efficient source of power, emit no pollutant gases and—with some types, anyway—can be designed to generate minimal waste and to be essentially meltdown-proof. That’s why Patrick Moore, a co-founder of Greenpeace, has become a nuclear booster and why many other environmentalists are beginning—sometimes grudgingly—to entertain the idea of embracing nuclear. Calling it green would be a stretch. Calling it sustainable is much less of one.
Myth 4: It’s all about recycling. “I get that a lot,” says Shana Weber, the manager of sustainability at Princeton University. “For some reason, recycling was the enduring message that came out of the environmental movement in the early 1970s.” And of course, recycling is important: reusing metals, paper, wood and plastics rather than tossing them reduces the need to extract raw materials from the ground, forests and fossil-fuel deposits. More efficient use of pretty much anything is a step in the direction of sustainability. But it is just a piece of the puzzle. “I deal with the people who run the recycling program here,” Weber notes, “but also with purchasing, dining services, the people who clean the buildings. The most important areas by far in terms of sustainability are energy and transportation.” If you think you are living sustainably because you recycle, she says, you need to think again.
Myth 5: Sustainability is too expensive. If there is an 800-pound gorilla in the room of sustainability, this myth is it. That’s because, as Gabriel observes, “there’s a grain of truth to it.” But only a grain. “It’s only true in the short term in certain circumstances,” Cortese says, “but certainly not in the long term.” The truth lies in the fact that if you already have an unsustainable system in place—a factory or a transportation system, for example, or a furnace in your house, an incandescent lightbulb in your lamp or a Hummer in your driveway—you have to spend some money up front to switch to a more sustainable technology.
In general, governments and companies can take that step more easily than individuals can. “Over the past seven years,” Cortese explains, “DuPont has made investments that have reduced its greenhouse gas emissions by 72 percent over 1990 levels. They’ve saved $2 billion.” The Pentagon is determined to cut its energy use by a third, both to save money and to reduce its dependence on risky foreign oil supplies.In other words, sometimes existing technology can make a huge difference. Sometimes it takes a creative business model. Israeli entrepreneur Shai Agassi, for example, wants to electrify the world’s car fleet—widely acknowledged as a big step toward cutting down carbon emissions—not by inventing a battery that gets 200 miles on a charge but by inventing a better system for letting drivers go as far as they want without recharging. His proposal, which has been adopted on a pilot basis by Israel and Denmark, would create battery exchange stations along highways, analogous to the gas canister exchanges that people now use for barbecue grills. What do you do if you are out on the road and your battery is running low? You pull into a station, your dead battery is swapped for a fully charged one and you’re on the road again in a few minutes. “He’s delivering distance, not better batteries,” says Mark Lee, CEO of the London consulting firm SustainAbility. “There’s an Italian utility that’s selling its customers hot water, not energy to heat water. It’s a different way of measuring, and it gives the company an incentive to be more efficient so it can be more profitable.”
Myth 9: Sustainability is ultimately a population problem. This is not a myth, but it represents a false solution. Every environmental problem is ultimately a population problem. If the world’s population were only 100 million people, we would be hard-pressed to generate enough waste to overwhelm nature’s cleanup systems. We could dump all our trash in a landfill in some remote area, and nobody would notice. Population experts agree that the best way to limit population is to educate women and raise the standard of living generally in developing countries. But that strategy cannot possibly happen quickly enough to put a dent in the population on any useful timescale. The U.N. projects that the planet will have to sustain another 2.6 billion people by 2050. But even at the current population level of 6.5 billion, we’re using up resources at an unsustainable rate. There is no way to reduce the population significantly without trampling egregiously on individual rights (as China has done with its one-child policy), encouraging mass suicide or worse. None of those proposals seems preferable to focusing directly on less wasteful use of resources.
Myth 10: Once you understand the concept, living sustainably is a breeze to figure out. All too often, a choice that seems sustainable turns out on closer examination to be problematic. Probably the best current example is the rush to produce ethanol for fuel from corn. Corn is a renewable resource—you can harvest it and grow more, roughly indefinitely. So replacing gasoline with corn ethanol seems like a great idea. Until you do a thorough analysis, that is, and see how energy-intensive the cultivation and harvesting of corn and its conversion into ethanol really are. One might get a bit more energy out of the ethanol than was sunk into making it, which could still make ethanol more sustainable than gasoline in principle, but that’s not the end of the problem. Diverting corn to make ethanol means less corn is left to feed livestock and people, which drives up the cost of food. That consequence leads to turning formerly fallow land—including, in some cases, rain forest in places such as Brazil—into farmland, which in turn releases lots of carbon dioxide into the atmosphere. Eventually, over many decades, the energy benefit from burning ethanol would make up for that forest loss. But by then, climate change would have progressed so far that it might not help. You cannot really declare any practice “sustainable” until you have done a complete life-cycle analysis of its environmental costs. Even then, technology and public policy keep evolving, and that evolution can lead to unforeseen and unintended consequences. The admirable goal of living sustainably requires plenty of thought on an ongoing basis.