Replacement of a small portion of food for cattle, pigs and chickens on protein waste products of microbes will help to reduce agricultural greenhouse gas emissions by seven percent.
This is reported by scientists in the journal Environmental Science & Technology.
This is the conclusion they came to based on computer simulations.
The main culprits of global warming are considered to be greenhouse gases. The increase of their concentration in the atmosphere over the last century have led to significant changes in climate — past 2017 was included in three of the hottest in history. One of the sources of greenhouse gases is agriculture. Deforestation to increase the area of arable land leads to the disappearance of sinks of carbon dioxide, as a result of fertilization with nitrogen, formed nitric oxide and ammonia, which can cause ground-level smog or ozone depletion.
The authors of the new work under the guidance of iłża Pikaar (Ilje Pikaar) decided to find out what effect the reduction in the amount of feed for cattle, chickens and pigs to greenhouse gas emissions. For this, they offered to replace the grains (oilseeds and pulses) on a single-celled protein. It is the protein products that are produced by the monoculture of microorganisms, such as yeast, bacteria or fungi and used as food additives to the diet of animals. To obtain them can be used carbon dioxide, methane, and sugar and starch.
Scientists conducted a computer simulation, which replaced a part of animal feed on unicellular protein. It covered the period up to 2050. For the production of 2-4 kilograms of protein per cubic meter per hour, scientists have proposed the use of bioreactors, similar to those used in the food industry. In total, the group analyzed 48 Pikara scenarios that dealt with various nutrient media for microorganisms and conditions — for example, full or partial replacement of cereals for protein.
According to calculations, by 2050, will be able to abandon 10-19 percent of plant food in favor of single-cell protein, and it will reduce agricultural emissions of greenhouse gases by seven percent. Methane emission will decrease by eight percent, while the area of arable land and 6 percent. The authors note that technologies that allow you to produce protein on an industrial scale, there are today. The researchers hope that the use of climate-bacterial proteins will force the state to pay attention to this technology.
Another source of greenhouse gases is considered to be international tourism. Its carbon footprint in 2013 amounted to approximately 3.9 gigatons of CO2 equivalents.