Food made from atmospheric carbon could feed the world while helping to fight climate change, according to Solar Foods, a Finnish company founded in 2017."We can collect CO2 anywhere," said its CEO Pasi Vainika, whose company has developed a protein powder made using CO2. "That's a strategic shift where raw materials are in the air." The protein powder, called Solein, can be turned into meat and dairy substitutes or added tofoods and shakes.
Solar Foods uses special units to pull CO2 from the atmosphere. To turn it into protein,microbes (微物),similar to those in the production of wine and yogurt, will be fed on it to grow and reproduce. During the process, water is split into hydrogen and oxygen. Along with a growth medium containing necessary minerals, the three gases are pumped in to feed the microbes. Harvested and dried, that remaining mixture becomes Solein—a yellow powder made up of single-cell protein, with a nutrient composition similar to wheat flour.
Solar Foods claims that Solein removes most of the emissions associated with modern agriculture, which is responsible for almost one-third of all greenhouse gas emissions. "One kilogram of Solein sends out 0.2 kilogram of CO2e(二氧化碳当量).In comparison.beef herds produce around 100 kilograms and chicken 10 kilograms," said Vainikka. " We can rermove the climate impact of modem food systems on the planet, which today account for about 30 per cent of global greenhouse gas emissions." He further stressed that while the company's factories also require some land used for industrial farming, only about one-tenth of the land is needed compared to photosynthesis (光合作用). "We could free up agricultural land to grow back forests," he added, "and those remove carbon permanently from the atmosphere."
Probably optimists are now contenting themselves with the pleasant scene of masses of trees absorbing CO2: on the planet. However, while that may sound great, Vainikka put it right, "It can happen only if we produce enough Solein from CO, to replace meat and dairy at a large scale."And that still remains a long way to go.