Ozone Season Lengths Across the Country

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Ozone Season Lengths Across the Country

  • Published: Jul 31st, 2019

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

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Explainer: How Ground-Level Ozone Is Formed

  • Published: Jul 31st, 2019

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

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How Ozone Levels Are Changing in Your City

  • Published: Jul 31st, 2019

Ozone pollution can reach unhealthy levels in your city. Here’s how the number of unhealthy ozone days have changed over time.

Hotter Summers Mean More Stagnant Air

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Hotter Summers Mean More Stagnant Air

  • Published: Jul 24th, 2019

Hotter summers often lead to more stagnant air—trapping air pollutants that can cause health problems.

Nationwide Trends in Air Stagnation Since 1973

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Nationwide Trends in Air Stagnation Since 1973

  • Published: Jul 24th, 2019

Since NOAA’s Index began in 1973, the number of annual stagnant days has increased in 83% of the contiguous U.S. cities analyzed.

 2019 Global Temperature Anomalies Through June

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2019 Global Temperature Anomalies Through June

  • Published: Jul 18th, 2019

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

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2019 Global Temperatures Through June: Among Top 5 Hottest on Record

  • Published: Jul 18th, 2019

The past five years have been the hottest on record globally — and 2019 is on pace to continue that trend.

More Extremely Hot Days (2019)

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More Extremely Hot Days (2019)

  • Published: Jul 10th, 2019

Climate change is making summer scorchers all the more extreme—check the trend for area.