The atmospheric concentration of a greenhouse gas increases from 420 ppm to 450 ppm over 15 years. What is the average annual rate of increase in ppm per year?

Tue, 05 May 2026 21:22:14 +0000

Title: Understanding the Rising Atmospheric Concentration of Greenhouse Gases: A 15-Year Increase from 420 ppm to 450 ppm Between 2020 and 2035, global atmospheric carbon dioxide (CO₂) concentrations rose from 420 parts per million (ppm) to 450 ppm—a significant jump with far-reaching implications for climate change. But just how fast is this concentration increasing on average each year? --- ### The Simple Math Behind the Trend