Building In Green

Efficiency is also key to relieving one of China's biggest roadblocks to modernization--its demand for energy. The Chinese use three times more energy per square meter to heat and cool buildings than Europeans and Americans, according to professor Yuan Bin at Beijing's Tsinghua University school of architecture. China is already the second largest energy consumer in the world, after the United States. Although only 23 million Chinese own cars, China produces 16 percent of the world's carbon-dioxide emissions and is set to overtake the United States as the world's biggest producer of CO2 within 30 years. If each person in China used as much energy as an average American, they would swallow up the world's entire current supply of petroleum. "China cannot consume energy like the U.S. because we have 1.3 billion people," says Yuan Bin.

If McDonough's method could be summed up in a phrase, it might be to leave nothing to chance. In each of the six cities, he is starting with a thorough examination of the land to be developed. He figures out how rainwater runs off and enters aquifers, how animals migrate, what plants grow where. He studies sunlight angles and wind patterns. Then he sketches in parks, which interconnect so citizens can walk or ride bicycles from one to the next and wildlife can carry on without disruption. Next comes the plan for the infrastructure, beginning with the angle of the streets. He slants them at a 15-degree angle to the winds in order to break up cold winter blasts and help keep city air clean. And orienting them on a diagonal rather than a rigid east-west grid also maximizes the sunlight that reaches apartments year-round. The cities are zoned for mixed residential, commercial and industrial use to ensure that transportation connects residences to the workplaces. Shops will be on the ground floor, residences above, and the rooftops will have farm plots. Bridges over the streets will connect the plots. The farmers will live downstairs.

Energy efficiency will be maximized through new types of building materials and a solar-powered energy grid. McDonough has begun by developing a polystyrene made by BASF without ozone-depleting chloro-fluorocarbons but with excellent insulating qualities. "Buildings can be heated and cooled for next to nothing," he says. "And they'll be silent. If there are 13 people in the apartment upstairs, you won't hear them." He's also working on new toilet bowls that are so slippery you can flush them with a light mist. Bamboo wetlands nearby would purify the waste, and the bamboo could be harvested and used for wood.

McDonough would like to see China's cities powered chiefly by solar panels. China, he says, is uniquely qualified to get solar power off the ground by virtue of its scale. "We're not talking about dinky solar collectors on roofs," he says. "Think of square miles of marginal land covered with them. This could drop the cost of solar energy an order of magnitude. And for every job making solar panels, there are four jobs putting them in place and maintaining them."

McDonough's ideas have worked well, albeit on a smaller scale, in the United States. He's designed green developments for communities and corporations, including the Gap and Ford. The headquarters for the clothing retailer the Gap in California has a roof with vegetation on it, a raised floor for better heating and cooling, and makes good use of daylight. The building exceeds California's energy requirements by 30 percent; Pacific Gas and Electric named it the second most energy-efficient building in the state.

In China, McDonough's plans for all six city districts have passed the government's standards test; three have gotten the green light. In Zhejiang province, the group has integrated the city of Ningbo's water system, creating wetlands that help conserve rainwater and protect animal and plant life. In Jinan, McDonough and his team are trying to clean up land contaminated by toxins from a steel plant. Outside Chengdu, in Sichuan province, they're trying to preserve an ancient landscape with old trees that would otherwise be leveled to make room for buildings and roads. "We're just at the beginning," McDonough said. "If you really want to see something, give us a few years."