“Nitrogen oxides (NOx) form aerosols and ozone in the atmosphere and are significant contributors to air pollution and climate change. China is the largest emitter, yet accurate and timely information on NOx emissions in China has been lacking since 2020 due to delays in emissions reporting.

In a study published in Environmental Science and Ecotechnology, researchers developed a satellite-based inversion system for real-time monitoring of regional air pollution emissions. Using data from this system and other independent observations, they show a consistent decline in China’s NOx emissions from 2020-2022, despite increased fossil fuel consumption.”

From Phys.org.