Look into the future of what we eat, and you'll start wondering what could happen to our meals. As the world's population surpasses nine billion, our food needs will grow by 50 percent. How do we meet them without clearing more forests or expanding industrial agriculture, one of the most significant contributors to climate change? How do we keep our soil healthy, so that crops can grow well?
These questions are challenging. "But one thing is clear," says food journalist Lin Yee Yuan. "To feed nine billion people," she warns, "we're going to need all hands to the pump."
Many of those hands likely will be trying to find new ways to produce protein as the environmental stress of animal production becomes increasingly great. Animal production represents about one-seventh of all human-made greenhouse gas emissions. Beef produced in concentrated feeding operations typically requires nearly eight times the water and 160 times the land per calorie as vegetables and grain. No wonder United Nations officials have been urging everyone to eat less beef—and new food companies are taking it seriously.
Among them is the producer of the Beyond Burger, a patty (肉饼) with beefy coloring and protein from plants that is already available throughout the United States in about 10,000 grocery stores and many restaurants.
Other solutions take inspiration from nature. By the early 2000s, staff at the Land Institute were selectively breeding (培育) a grain to create a variety with better production, seed size, and disease resistance.
Today the result, called Kernza, is growing on 500 acres in the United States. A variety of food producers are readying it for market—including Bien Cuit, a high-end bakery in New York, which has made bread with it, and Hopworks Urban Brewery in Oregon, which sells a Kernza beer. "Whatever our meals may be like in 50 years, climate change will require us to make better use of what we already have," says global food expert Raj Patel. "The 21st century is teaching us that things once thought to be weeds and pests could turn out to be food."
