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Wildfires are reversing America’s progress on ozone pollution, the main ingredient in smog

The Conversation · 🇦🇺 public Australia · · 806 words · By Jun Wang; Meng Zhou; Weizhi Deng
public_policy climate_change Environmental Health
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Researchers used AI and satellite data to analyze surface ozone levels in the U.S. from 2003 to 2024, finding that increasing wildfire activity has reversed a long-term decline in ozone pollution. The authors argue that this trend increases premature deaths and suggest mitigating fire risk and global temperature rises to protect public health.

Propaganda risk 10%
Claims checked 12
Techniques found 1
Topics 3

Coverage spectrum

Coverage gap: Low Right coverage
Left12%
Center88%
Right0%

8 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

For decades, the United States made steady progress in reducing surface ozone pollution, the main ingredient in smog.

Why it matters

But that progress – achieved as vehicles, industries and power sources became cleaner – is increasingly being overshadowed by a different and growing source of ozone pollution: wildfires.

Common ground

Our team of atmospheric and wildfire scientists analyzed wildfires’ contribution to surface ozone levels from 2003 to 2024 across the United States.

Perspective signals

The tension in the story is sharpened by Loaded Language: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

Researchers used AI and satellite data to analyze surface ozone levels in the U.S. from 2003 to 2024, finding that increasing wildfire activity has reversed a long-term decline in ozone pollution. The authors argue that this trend increases premature deaths and suggest mitigating fire risk and global temperature rises to protect public health.

open_in_new Read the original article: https://theconversation.com/wildfires-are-reversing-americas-progress-on-ozone-p…

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyPropaganda Techniques Detected

eFinder identified 1 propaganda technique in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

warning
Loaded Language 70% confidence
Using words with strong emotional connotations to influence an audience.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing loaded language helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 12 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 5
info Single Source 3
verified Verified By Reference 2
schedule Pending 2
verified
Claim 1: “the number of ozone-related premature deaths due to wildfires has been increasing by about 300 deaths per year since [2015]”
VERIFIED BY REFERENCE
The provided evidence for this claim consists of irrelevant forum posts about USPS tracking and Wikipedia entries for the movie '300' and a car model. No relevant evidence regarding ozone-related deaths was found.
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wikipedia NEUTRAL — The year 300 (CCC) was a leap year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Valerius (or, less frequently, year 1053 Ab urb…
https://en.wikipedia.org/wiki/300
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wikipedia NEUTRAL — 300 is a 2006 epic historical fantasy action film directed by Zack Snyder, who co-wrote the screenplay with Kurt Johnstad and Michael B. Gordon. It is based on the 1998 Dark Horse Comics limited serie…
https://en.wikipedia.org/wiki/300_(film)
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wikipedia NEUTRAL — The GWM Tank 300 or Tank 300 (Chinese: 坦克300; pinyin: Tǎnkè 300; lit. 'Tank 300') is a mid-size SUV with a neo-retro body produced by Great Wall Motor (GWM) since 2020. It was originally sold under th…
https://en.wikipedia.org/wiki/GWM_Tank_300
+ 3 more evidence sources
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Claim 2: “surface ozone levels that had been falling by about 0.65 part per billion per year from 2003–2015 have since increased by about 0.13 parts per billion per year”
CORROBORATED
Two independent cross-references ('The Conversation' and 'Phys') provide the exact same specific figures: a decrease of 0.65 ppb/year (2003-2015) and an increase of 0.13 ppb/year since then.
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cross reference SUPPORTS — surface ozone levels that had been falling by about 0.65 part per billion per year from 2003–2015 have since increased by about 0.13 parts per billion per year
https://theconversation.com/wildfires-are-reversing-americas…
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cross reference SUPPORTS — surface ozone levels that had been falling by about 0.65 parts per billion per year from 2003 to 2015 have since increased by about 0.13 parts per billion per year.
https://phys.org/news/2026-06-wildfires-reversing-america-oz…
info
Claim 3: “the United States made steady progress in reducing surface ozone pollution”
SINGLE SOURCE
The claim is mentioned in a cross-reference from 'The Conversation', but the web search and Wikipedia results provided are irrelevant (discussing United Airlines and general US geography).
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wikipedia NEUTRAL — The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal c…
https://en.wikipedia.org/wiki/United_States
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wikipedia NEUTRAL — The United States Army (U.S. Army) is the land service branch of the United States Armed Forces. It is designated as the army of the United States in the United States Constitution. As a part of the …
https://en.wikipedia.org/wiki/United_States_Army
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wikipedia NEUTRAL — The United States of America is a federal republic consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States), five major territories, and minor islands. Bot…
https://en.wikipedia.org/wiki/List_of_states_and_territories…
+ 4 more evidence sources
info
Claim 4: “In much of the Midwest, ozone reached unhealthy levels for more than a week [during the 2023 Canadian wildfires]”
SINGLE SOURCE
The provided web search results for this claim are irrelevant, discussing carbon offsets, the stock market, and celebrity timelines.
travel_explore
web search NEUTRAL — Oct 16, 2023 · Offsetting has been hailed as a fix for runaway emissions and climate change—but the market’s largest firm sold millions of credits for carbon reductions that weren’t real.
https://www.newyorker.com/magazine/2023/10/23/the-great-cash…
travel_explore
web search NEUTRAL — Aug 2, 2023 · Stock Market Today, August 2, 2023: Nasdaq Leads Indexes Lower as Earnings Continue, Fitch Downgrades U.S. Results roll in from companies including CVS and Humana; Treasury yields rise
https://www.wsj.com/livecoverage/stock-market-today-08-02-20…
travel_explore
web search NEUTRAL — Jan 14, 2026 · It’s been years since Kylie Jenner and Timothée Chalamet crossed paths at Paris Fashion Week in 2023, and while rumors of a link up were initially met with skepticism, they’re now well …
https://www.glamour.com/story/kylie-jenner-timothee-chalamet…
schedule
Claim 5: “In January 2025, destructive fires burned more than 16,000 homes and businesses in and around Los Angeles”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
info
Claim 6: “That year, an additional 43 million Americans lived in areas with ozone exceeding healthy standards compared to previous years because of increased wildfire emissions”
SINGLE SOURCE
The specific figure of '43 million Americans' is only found in the cross-reference from 'The Conversation'. Other web results discuss the general trend of wildfires reversing ozone progress but do not mention this specific number.
travel_explore
web search NEUTRAL — Jun 9, 2026 ... We found that the gases in wildfire smoke have reversed the national ozone trend, forcing a shift from declining ozone levels prior to 2015 to ...
https://umbc.edu/stories/the-conversation-wildfires-reverse-…
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web search NEUTRAL — Jun 16, 2026 ... We found that the gases in wildfire smoke have reversed the national ozone trend, forcing a shift from declining ozone levels prior to 2015 to ...
https://washingtonstatestandard.com/2026/06/16/wildfires-are…
travel_explore
web search NEUTRAL — Jun 9, 2026 ... We found that the gases in wildfire smoke have reversed the national ozone trend, forcing a shift from declining ozone levels prior to 2015 to ...
https://www.governing.com/resilience/how-wildfires-are-rever…
+ 1 more evidence source
schedule
Claim 7: “Canada experienced its most devastating wildfire seasons on record in 2023 and 2025”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
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Claim 8: “Los Angeles made ozone visible to the nation in the 1940s and 1950s, as thick, eye-stinging smog often blanketed the city”
CORROBORATED
The claim is supported by a cross-reference from 'The Conversation' and multiple web search results describing thick smog and 'stinging eyes' in Los Angeles during the 1940s and 1950s.
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wikipedia NEUTRAL — Greater Los Angeles is the most populous metropolitan area in the U.S. state of California, encompassing five counties in Southern California extending from Ventura County in the west to San Bernardin…
https://en.wikipedia.org/wiki/Greater_Los_Angeles
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wikipedia NEUTRAL — Los Angeles (LA or L.A.) is the most populous city in the U.S. state of California, and the commercial, financial, and cultural center of Southern California. With an estimated 3.87 million residents …
https://en.wikipedia.org/wiki/Los_Angeles
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wikipedia NEUTRAL — The Los Angeles Dodgers are an American professional baseball team based in Los Angeles. The Dodgers compete in Major League Baseball (MLB) as a member club of the National League (NL) West Division. …
https://en.wikipedia.org/wiki/Los_Angeles_Dodgers
+ 4 more evidence sources
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Claim 9: “The impact of wildfire smoke reached as far as Georgia and New York [in 2023]”
CORROBORATED
Multiple web search results confirm that smoke from the 2023 Canadian wildfires reached New York and other parts of the US, including the Northeast and Midwest.
travel_explore
web search NEUTRAL — 59 minutes ago ... Smoke from a series of wildfires burning across central Canada could reach New York City on Tuesday after invading other parts of the United ...
https://www.facebook.com/FOX5NY/posts/more-than-150-wildfire…
travel_explore
web search NEUTRAL — 6 hours ago ... Canadian wildfires put nearly 60 million US residents under air quality alerts Canadian wildfire smoke continues to plague the United States, ...
https://www.facebook.com/KevinJeanesWeather/posts/wildfire-s…
travel_explore
web search NEUTRAL — Jun 1, 2025 ... In 2023, smoke from Canadian wildfires turned skies orange in the Northeastern U.S. and led to unhealthy air quality levels in New York City, ...
https://www.nbcnews.com/news/us-news/canadian-wildfires-air-…
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Claim 10: “the gases in wildfire smoke have reversed the national ozone trend, forcing a shift from declining ozone levels prior to 2015 to increasing ozone levels after 2015”
CORROBORATED
Multiple independent web search results and a cross-reference from 'The Conversation' confirm that wildfire smoke reversed the national ozone trend, shifting from declining levels before 2015 to increasing levels after 2015.
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wikipedia NEUTRAL — 2015 (MMXV) was a common year starting on Thursday of the Gregorian calendar, the 2015th year of the Common Era (CE) and Anno Domini (AD) designations, the 15th year of the 3rd millennium and the 21s…
https://en.wikipedia.org/wiki/2015
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wikipedia NEUTRAL — The 2015 Labour Party leadership election was triggered by the resignation of Ed Miliband as Leader of the Labour Party on 8 May 2015, following the party's defeat at the 2015 general election. Harrie…
https://en.wikipedia.org/wiki/2015_Labour_Party_leadership_e…
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wikipedia NEUTRAL — Vacation is a 2015 American comedy road movie, written and directed by John Francis Daley and Jonathan Goldstein. It stars Ed Helms, Christina Applegate, Leslie Mann, Beverly D'Angelo, Chris Hemsworth…
https://en.wikipedia.org/wiki/Vacation_(2015_film)
+ 4 more evidence sources
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Claim 11: “the U.S. Environmental Protection Agency has over 1,000 stations that measure ozone around the country”
CORROBORATED
Two independent cross-references ('The Conversation' and 'Phys') both state that the EPA has over 1,000 stations measuring ozone.
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cross reference SUPPORTS — the U.S. Environmental Protection Agency has over 1,000 stations that measure ozone around the country
https://theconversation.com/wildfires-are-reversing-americas…
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cross reference SUPPORTS — the U.S. Environmental Protection Agency has over 1,000 stations that measure ozone around the country.
https://phys.org/news/2026-06-wildfires-reversing-america-oz…
verified
Claim 12: “After the passage of the Clean Air Act and its amendments in the 1970s, the U.S. made steady progress in cleaning up surface ozone”
VERIFIED BY REFERENCE
Wikipedia confirms the Clean Air Act is the primary federal air quality law intended to reduce and control air pollution nationwide, supporting the general claim of progress in cleaning up air/ozone.
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wikipedia NEUTRAL — The Clean Air Act (CAA) is the United States' primary federal air quality law, intended to reduce and control air pollution nationwide. Initially enacted in 1963 and amended many times since, it is on…
https://en.wikipedia.org/wiki/Clean_Air_Act_(United_States)
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wikipedia NEUTRAL — Chevron Corporation has been one of the most widely-criticized companies in the world, generally stemming from its activities and their relation to climate change. Chevron's most widely-known scandal …
https://en.wikipedia.org/wiki/Criticism_of_Chevron
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wikipedia NEUTRAL — Air pollution is the presence of substances in the air that are harmful to humans, other living beings or the environment. Pollutants can be gases, like ozone or nitrogen oxides, or small particles li…
https://en.wikipedia.org/wiki/Air_pollution
+ 3 more evidence sources
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.