Is China turning the tide on pollution? The country stands to benefit not just environmentally, but financially as well. A new MIT study found if China reduces carbon dioxide emissions by four percent a year, the nation could net around $339 billion in health savings by the year 2030. That figure could be around four times what it would cost the country to achieve climate goals – in other words, according to MIT, “the country’s climate policy would more than pay for itself.”

A mountain, lake, and bicycle in the city of Guilin in southern China

Fulfilling its international pledge to cut carbon emissions makes sense for China in many ways. Not only could the nation contribute significantly to the global battle against climate change (as it’s the world’s largest emitter of greenhouse gases) – but the health impacts for Chinese citizens could be huge. Improving air quality could avoid a considerable amount of deaths from air pollution in every province — and MIT put a dollar figure on the benefit to society: $339 billion.

Related: China reports meeting its 2020 carbon intensity goals three years early

MIT associate professor Noelle Eckley Selin co-authored the study published today in Nature Climate Change. In a statement, she said: “The country could actually come out net positive, just based on the health co-benefits associated with air quality improvements, relative to the cost of a climate policy. This is a motivating factor for countries to engage in global climate policy.”

China's Great Wall landscape near Beijing

How did the team reach their figure? They developed a modeling approach called the Regional Emissions Air Quality Climate and Health framework, combining an energy-economic model and atmospheric chemistry model. They used the energy-economic model “to simulate how a given climate policy changes a province’s economic activity, energy use, and emissions of carbon dioxide and air pollutants.” They ran simulations under four scenarios: one with no policy and three with policies aiming to cut emissions through 2030 by three, four, and five percent a year. They then plugged in results into the atmospheric chemistry model and estimated particulate matter concentrations for provinces to help calculate the pollution communities are inhaling. Epidemiological literature helped them figure out how many deaths could be avoided. They calculated the economic value of the deaths, which they compared against the total cost of implementing a policy scenario.

Their findings? In a no-policy scenario, by 2030 there would be over 2.3 million premature, pollution-related deaths. In the three, four, or five percent emissions reductions scenarios, China could respectively avoid 36,000, 94,000, and 160,000 premature deaths. The savings “gained as a result of health co-benefits equals $138.4 billion, $339.6 billion, and $534.8 billion, respectively,” according to MIT.

+ MIT

Images via Diego Jimenez, Frak Lopez, and Manon Boyer on Unsplash