New research suggests accurately mapping pasture areas where stopping cattle grazing would allow vegetation and soil to be restored, sequester large amounts of carbon dioxide, and reduce the damage to meat and milk production.
Global climate change poses growing challenges to environmental protection and agricultural development. With it, the need for data-based solutions that balance nature conservation with ensuring food security for the growing world population is growing. One of these challenges concerns the central role that the cattle industry plays in the emission of greenhouse gases that cause global warming. Since it is unrealistic to expect humanity to give up meat consumption, perhaps the solution lies in the way we manage pastures?
study A study by New York University's Department of Environmental Studies now offers a precise roadmap for combating climate change. Instead of fighting all meat production, it suggests simply returning certain pastures to their wild state, showing that by carefully selecting the most suitable areas, it is possible to absorb a huge amount of carbon dioxide from the atmosphere at minimal nutritional and economic cost.
From the air to the ground
Carbon sequestration is the process of capturing carbon dioxide (CO) from the atmosphere.2), which is one of the main greenhouse gases involved in climate warming, and stores it over time in natural reservoirs such as vegetation, soil or ocean water. Plants do this through the process of photosynthesis: they absorb carbon dioxide from the air, break it down and use the carbon in it to build their trunk, branches, leaves and roots. Some of this carbon finds its way into the soil, when organic matter such as leaves falls to the ground and remains there. This is a very important component in the fight against climate change, because it not only curbs the emission of greenhouse gases into the atmosphere but actually cleans the air of them.
The main innovation of this study is its detailed and broad approach. The researchers focused exclusively on areas currently used for grazing – a vast area covering some 27 million square kilometers worldwide, which is about a third of the Earth’s land area. They divided this area into a dense grid of millions of squares with a resolution called “5 arc minutes” – a geographical term that means dividing the area into small, precise squares of a few square kilometers each. For the mapping, they did not take field measurements but instead drew and cross-referenced data from existing global databases to learn about the distribution of grazing areas, meat and milk production and the geographic potential for carbon storage in vegetation and soil.
Each plot was examined to calculate what would happen if cattle grazing were stopped: how much carbon would be re-stored in the vegetation that would grow and the soil that would recover, and how much meat and dairy production would be lost from the same area. Previous analyses were cruder and did not allow conservation efforts to be properly targeted.
The study used a complex computational and analytical approach, combining geographic information system (GIS) models with a variety of data analyses. First, the researchers collected data on land use from around the world, identifying areas used for grazing. They also examined data on the distribution of vegetation in these areas to estimate how much carbon is stored in existing vegetation and what the potential for regrowth is in areas where grazing would cease.
Additional data estimated how much carbon is stored in the soil and how much more carbon it can sequester. To complete the picture from a nutritional perspective, the researchers mapped the global distribution of cattle and meat production in different regions. In addition, climate data, such as temperature, precipitation and climate types, were taken into account, which have a decisive influence on the rate of vegetation growth and carbon sequestration.
Based on this data, the researchers developed an index called the “carbon opportunity intensity.” The index quantifies the potential for carbon sequestration per unit area if cattle were removed. It takes into account the carbon that would be stored in above-ground vegetation and in the soil itself, and weights it with the current meat yield from that area. Using statistical, machine learning, and optimization models, the researchers identified the conditions under which maximum carbon sequestration is achieved while minimizing the impact on meat production.
The amount of edible vegetation has increased each year in grazing areas. The darker the shade, the more vegetation has grown per unit area. Green indicates grazing in areas with natural forest potential, while pink indicates grazing in natural grasslands | Matthew Hayek and Johannes Piipponen
Double profit
Research Hope-inspiring Significant progress in the fight against the climate crisis. The findings show that stopping grazing in specific areas defined as “high carbon opportunity intensity” could lead to the fixation of about 34 gigatonnes of carbon in vegetation and soil by the end of this century, i.e. removing nearly 125 gigatonnes of carbon dioxide from the atmosphere. This is a huge amount, exceeding all carbon dioxide emissions worldwide from the burning of fossil fuels in the years 2021–2023. This expected impact highlights the enormous potential that targeted and informed changes in land use related to grazing have to combat the climate crisis.
Equally important, the study suggests a course of action that does not drastically harm global food security, that is, our ability to provide food for the entire world population. The proposed approach takes into account the importance of cattle to global food security. Animal products They currently provide 18 percent of the calories consumed by humans and 34 percent of the world's protein, and are an essential source of nutrients such as vitamin B.12 and iron. Their contribution to the economy is also very significant, as livestock provides a livelihood for more than half a billion people in rural areas.
The current study shows a very significant potential for carbon sequestration from the atmosphere, with only minor harm to the pasture-based cattle industry, which accounts for only 13 percent of its output. Moreover, most of the harm will occur in economically established regions, where there is a fairly high potential for moves to change consumption habits and encourage a shift to other protein sources in these regions without severely harming those who depend on cattle for their livelihoods.
The study, therefore, does not call for the complete elimination of the cattle industry, but only for its efficiency. It provides insights that allow for maximizing carbon sequestration from pastures, while ensuring an adequate level of food security. This approach, based on accurate science and detailed data analysis, may contribute to the design of more effective and balanced policies to deal with climate change.
Short FAQ:
What does the research suggest?
The study suggests stopping cattle grazing only in certain pastures where carbon sequestration potential is particularly high, rather than reducing the entire cattle industry.
How can stopping grazing help the climate?
When grazing is stopped in suitable areas, vegetation can regenerate and the soil can store more carbon. This means less carbon dioxide remains in the atmosphere.
Does the study call for a complete cessation of meat consumption?
No. The study proposes a targeted approach that aims to reduce the damage to food production, while selecting the areas where the climate benefit will be greatest.
How big is the potential that the research found?
According to the findings, stopping grazing in areas with high potential could sequester about 34 gigatons of carbon by the end of the century, which is close to 125 gigatons of carbon dioxide.
Why is it important to map the areas accurately?
Because not all pastures are equally suitable for restoration. Accurate mapping makes it possible to identify places where carbon sequestration will be high, but the loss of meat and dairy production will be relatively low.
More of the topic in Hayadan:
3 תגובות
Where will the cattle be removed from the selected area and have the carbon emissions from the area to which the cattle will be moved been calculated?
A complete lie, the publisher of the article, in my opinion, has an interest in allowing the visitor to continue destroying nature.
You don't have to look at it from one perspective that grazing is not good. In the past, wild animals roamed and ate the grass. The world has become more modern and the chance of fires, whether intentional or not, is greater. Grazing cleans the grass and returns minerals to the soil and prevents fires from spreading.