Overview

• Researchers used 17 years of satellite data to detect human-caused ozone increases in the upper troposphere.
• The study found a distinct human 'fingerprint' in ozone trends, particularly over Asia.
• Ozone acts as a potent greenhouse gas in the upper troposphere, contributing to global warming.
• The increase in upper tropospheric ozone contrasts with decreasing levels near the Earth's surface in some regions.
• Identifying specific human activities responsible for the rise can inform strategies to combat climate change and air pollution.