Topics Greenhouse Gases
Ozone Season Lengths Across the Country
As long as ozone season sticks around, so do concerns about the health risks of poor air quality. Check out where ozone is an issue across the country.
Explainer: How Ground-Level Ozone Is Formed
Ground-level ozone is a hazardous air pollutant and a key component of smog. Here’s how it forms.
How Ozone Levels Are Changing in Your City
Ozone pollution can reach unhealthy levels in your city. Here’s how the number of unhealthy ozone days have changed over time.
2019 Global Temperature Anomalies Through June
While U.S. temperatures have been relatively mild this year, the rest of the world has endured near-record heat.
2019 Global Temperatures Through June: Among Top 5 Hottest on Record
The past five years have been the hottest on record globally — and 2019 is on pace to continue that trend.
Daily Template: CO2 in the Context of Human History
This image puts today’s CO2 levels in historical context. Spoiler alert: we’re off the charts.
Daily Template: The Rise of CO2
CO2 has seasonal fluctuations but its stark, long-term rise is unmistakable.
800,000 Years of Carbon Dioxide
Yes, CO2 levels have varied in Earth’s past. But today’s levels are the highest in millions of years and increasing at an unprecedented rate.
