Win-win or Trade-off: Effects of the Major Function Zoning Strategy on Economic Growth and Carbon Emission Reduction in the Yellow River Basin

In the vast, complex task of governing a modern nation, leaders face a persistent and difficult question: how can a region grow its economy without choking the air and poisoning the land? For decades, the prevailing wisdom suggested that these two goals were locked in a zero-sum game. To get richer, a place often had to burn more fuel and build more factories; to clean the air, it often had to shut down industries and slow down growth. This tension is particularly sharp in river basins, where water, soil, and air connect communities across hundreds of miles, making the actions of one town the responsibility of all. In China, a massive experiment in spatial governance was launched to solve this puzzle. Instead of treating every county the same, the government drew a map that assigned specific roles to different areas. Some counties were told to focus on protecting nature, others on growing food, and others on building cities and industry. This strategy, known as Major Function Zoning, was designed to let each area do what it does best, with the hope that the whole basin would become both wealthier and cleaner. But does this division of labor actually work, or does it simply shift the problems from one place to another?

A team of researchers set out to answer this by looking closely at the Yellow River Basin, a region that produces a quarter of China's economic output but also generates a third of its carbon emissions. They gathered data from nearly 740 counties over two decades, tracking how much money each place made and how much carbon it released into the atmosphere. By comparing counties that were assigned different roles before and after the zoning policy took effect in 2010, they could see what actually changed. The results revealed a story that is far more nuanced than a simple victory or defeat. The policy did not create a perfect "win-win" scenario where every single area grew richer and cleaner at the same time. Instead, it created a series of trade-offs, where different parts of the basin sacrificed one goal to achieve the other, effectively managing the tension rather than eliminating it.

The researchers found that the counties designated as Key Ecological Function Zones, which are often in mountainous or fragile areas, saw a distinct boost in their economic growth after the policy began. These areas, which had previously struggled with poverty, started to grow faster than their wealthier neighbors. The secret to this success was not a sudden boom in factories or mines, which were largely banned in these zones, but rather a flow of money from the central government. Because these counties were protecting the environment for the rest of the nation, they received significant financial transfers to support their local budgets. This extra money allowed them to build infrastructure and improve services, narrowing the economic gap between the poor ecological zones and the richer industrial ones. However, this economic gain came with a cost: the carbon emissions in these ecological zones continued to rise, albeit at a slower pace than before. The money helped the economy, but it did not yet decouple that growth from pollution.

In contrast, the counties assigned to Prioritized and Optimized Zones, which are the industrial and urban heartlands, faced the opposite dynamic. Here, the policy acted as a brake on pollution. By strictly controlling how much land could be used for construction and industry, the policy successfully slowed down the growth of carbon emissions in these areas. The researchers calculated that the rate at which carbon emissions grew in these industrial zones dropped significantly compared to the ecological zones. Yet, this environmental success was not without its own price. The strict limits on land use meant that these areas could not expand their economies as quickly as they might have otherwise. They were effectively trading rapid economic expansion for a cleaner environment, proving that the old dilemma of growth versus green still held true in these specific locations.

The situation was perhaps most complex in the Major Grain Producing Zones, the counties dedicated to feeding the nation. Here, the policy created a double-edged sword. The mandate to protect farmland meant that these counties could not easily convert their fields into industrial parks or housing developments. As a result, their economic growth slowed down noticeably compared to other regions, widening the gap between them and the wealthier industrial counties. At the same time, this restriction on development did help curb the growth of carbon emissions, as there was less new construction and fewer new factories. The researchers noted that while these areas were successful in keeping emissions low, they were left behind economically, suggesting that the current system of financial support was not enough to compensate them for the opportunity cost of not industrializing.

Ultimately, the study paints a picture of a strategy that is working, but not in the way many had hoped. The Major Function Zoning policy did not magically solve the conflict between making money and saving the planet. Instead, it made the conflict manageable by assigning different parts of the burden to different places. The ecological zones got money to grow, the industrial zones got rules to clean up, and the farming zones got protection that slowed their growth. The researchers concluded that while the policy successfully narrowed the economic gap for the poorest ecological areas and slowed the pollution spike in the richest industrial areas, it did so by accepting that some places would grow slower to let others grow faster, and some places would pollute less by growing less. This spatial trade-off suggests that for large river basins around the world, the path to a sustainable future may not be about finding a single solution that works everywhere, but about carefully balancing different roles across the landscape, ensuring that the costs and benefits are shared fairly.