Real Climate

NOVEMBER 17, 2024

Where, at the beginning, there was really only one input parameter (the CO 2 concentration) that needed to be coordinated, the inputs have now broadened to include myriad forcings related to other greenhouse gases, air pollution, land surface change, ozone, the sun, volcanoes, irrigation, meltwater etc.

2003

Union of Concerned Scientists

MAY 21, 2025

It presents air pollution data at the county-level for two pollutants, deadly fine particulate matter (PM 2.5 ) and ground-level ozone. is emitted directly from the tailpipes of gasoline and diesel vehicles, while ozone and even more PM 2.5 and ozone pollution 1. Internal combustion vehicles are largely to blame, since PM 2.5

Ozone

PA Environment Daily

NOVEMBER 21, 2024

“The commitments under the settlements will significantly reduce pollution from these companies’ operations, including volatile organic compounds that contribute to ground-level ozone, and methane, a potent greenhouse gas.” XTO is a natural gas extraction and production company that is a directly held, wholly owned subsidiary of ExxonMobil.

Clean Air Act

HumanNature

JANUARY 30, 2025

We breathe oxygen from the atmosphere, weather systems distribute water, and the ozone in the upper atmosphere protects us from harmful radiation. 5] Additionally, the reaction of these volatile chemicals contributes to ground-level ozone production, which, unlike ozone in the stratosphere, is hazardous to human health.

Ozone

Union of Concerned Scientists

JUNE 17, 2025

EPA affirmed the basis for California’s regulation, noting “the large share of older locomotives in the Class I, II, and III railroad fleets and their emissions[‘] contribution to ambient concentrations of air pollution that may violate the ozone and particulate matter [air quality standards].”

Regulations

Legal Planet

MARCH 17, 2025

The category of “volatile chemicals” includes a number of different chemicals that cause ozone pollution. There is also precedent for combining multiple pollutants that have similar effects into a single category. It will need a reasoned explanation for why to split them up.

Clean Air Act

Legal Planet

DECEMBER 18, 2024

Notably, in granting the Advanced Clean Car waiver , EPA relied heavily on the fact that the program cuts traditional air pollutants, including those that cause ozone pollution, from vehicles. Southern California is called an extreme nonattainment area for ozone. Here’s some important background.

Clean Air Act

Circle of Blue

JULY 9, 2025

The Paris Climate Agreement seemed well-positioned to join the 1963 Nuclear Test Ban Treaty (halting atomic explosions above ground that contaminated the atmosphere) and the 1987 Montreal Protocol (ending use of chemicals that damaged the ozone layer) as one of the three most significant environmental treaties ever negotiated.

Clean Energy

Legal Planet

MAY 19, 2025

California needs the waivers to meet pollution standards for ozone and fine particulate matter. The South Coast basin has never met the federal ozone standard and can’t meet one that was set in 1997, let along two tougher standards enacted since then. The Central Valley also violated the ozone standard. Heavy duty trucks.

Ozone

Union of Concerned Scientists

JANUARY 16, 2025

Both locations near the Paris and Oak Creek sites experience ozone and small particulate matter (PM 2.5 ) concentrations above the states average, signaling that these local communities are already facing heavy environmental health risks.

Nitrogen Oxides

Legal Planet

JUNE 24, 2025

In a separate case, a unanimous Supreme Court “ raised the bar for EPA to steer challenges over ozone pollution State Implementation Plans to its preferred venue, the US Court of Appeals for the D.C. Circuit,” reports Bloomberg Law.

Clean Energy

PA Environment Daily

APRIL 7, 2025

The amendment would cover pollution from major oil and gas infrastructure and pipelines, power plants and many other facilities that emit these air pollutants.

Air Pollution

Circle of Blue

MARCH 19, 2025

Now a $314-million-a-year global organization with 1000 employees, EDF went on to influence pivotal environmental achievements, among them the formation of the Environmental Protection Agency in 1970, and then helping the agency ban DDT and close the ozone hole.

Clean Air Act

Union of Concerned Scientists

FEBRUARY 10, 2025

UCS/S&P Global Mobility 2024 This accelerated transition to cleaner on-road freight is vital to reduce harmful air pollution generated from trucks, given that theyre the largest source of ozone-forming nitrogen oxides (NOx) pollution in the nation and the largest source of lung-damaging fine particulates from vehicles on the road.

Nitrogen Oxides

PA Environment Daily

JANUARY 24, 2025

Three hearings have been scheduled. Read more here ].

Ozone

Environmental News Bits

APRIL 23, 2025

Nearly half of Americansor about 156 million peopleare living in counties with failing grades for ozone or particulate … Continue reading Nearly half of Americans are breathing unhealthy air as pollution exposure numbers reach decade high

Ozone

Union of Concerned Scientists

MAY 15, 2025

Although warehouses themselves are often not significant sources of air pollution, they attract high concentrations of heavy-duty trucks, which are the nations largest source of nitrogen oxides, a key contributor to ground-level ozone pollution.

Ground-Level Ozone

Legal Planet

APRIL 30, 2025

The same report finds that at least 156 million Americans, about 46 percent of the population, live with unsafe levels of ozone, particulate pollution or both. Despite huge advances over the decades, Los Angeles is still the nations smoggiest city, according to a report released a day after Earth Day by the American Lung Assn. More Energy!

Fossil Fuels

PA Environment Daily

JULY 10, 2025

VOCs, such as benzene, are harmful to health and can contribute to ground level ozone or smog that damages lungs and can trigger asthma attacks. Where there are oil and gas operations, you can find methane leaking along with volatile organic compounds.

Natural Gas

PA Environment Daily

APRIL 27, 2025

Latest Report -- Erie Times: Canadian Wildfires Drop Erie Countys Grade In State Of The Air Report -- WTAE: Wildfire Smoke From Canada Impacted Air Quality In Pittsburgh -- Beaver Times: State Of The Air Report Gives Beaver County Passing Grade For Ozone, Particulates -- Tribune-Democrat: Special Report: Earths Warming Affecting Americans From Coast (..)

Earth Day

PA Environment Daily

JULY 30, 2025

million Pennsylvanians living within a half-mile of active well sites. -- Allegheny, Bucks, and Philadelphia counties all received a D or F grade for ozone pollution in the American Lung Association’s 2025 State of the Air report. -- Nationally, air pollution from methane and co-pollutants causes an estimated $77 billion in annual health costs.

Clean Air Act

PA Environment Daily

MAY 9, 2025

Pennsylvania has historically been an energy leader, but were falling behind other states in the necessary transition to clean energy.

Air Pollution

PA Environment Daily

MARCH 7, 2025

The revised permit would increase the acreage by 1.3 acres in the Unami Creek Watershed (High Quality). (

Nitrogen Oxides

Environmental News Bits

JULY 31, 2025

For more than half a century, the Environmental Protection Agency’s Office of Research and Development, or ORD, has furnished the EPA with independent research on everything from ozone pollution to pesticides like glyphosate.

Ozone

Legal Planet

OCTOBER 28, 2024

loss of stratospheric ozone); important aspects of regional climate (e.g., On the positive side, the National Academy of Sciences says solar geoengineering “ could reduce surface temperatures and potentially ameliorate some risks posed by climate change (e.g.,

2024

Union of Concerned Scientists

AUGUST 7, 2025

When combined with summer heat and ground level ozone, conditions can worsen further. By adding fine particulates to the air, wildfires can drive unhealthy air quality conditions, as measured by the AQI, shown above.

Ground-Level Ozone

PA Environment Daily

APRIL 24, 2025

Critic Says, We Want To Be A Little More Cautious -- PA Capital-Star: FERC Approves Shapiros PJM Settlement To Halt Runaway Electricity Prices -- DelawareValleyJournal.com: Grid Operator PJM Rejects Accusations Its Slow-Rolling Renewable Energy Generation -- PennWATCH: Allegheny Conference, Pittsburgh Regional Building Trades Council Join Energy Future (..)

Nuclear Power

Legal Planet

AUGUST 13, 2025

15th on whether California’s Central Valley is out of compliance with federal standards for smog-forming ozone. “The initial 11–0 vote was a resounding sign of approval; the final hearing is likely to occur Sept. EPA officials have agreed to issue a decision by Sept.

Fossil Fuels

Scientific American

JULY 16, 2025

Air pollutants like ozone and nitrogen dioxide can cause inflammation in the nerves that play a role in migraines. Temperature extremes, with very hot or very cold days , or sudden changes in temperature , can throw off the body’s internal balance. High humidity or rapid shifts in moisture levels can have a similar effect.

Ozone

Environmental News Bits

AUGUST 11, 2025

Mango lovers and growers alike may soon rejoice: scientists at Edith Cowan University have found that a simple dip in ozonated water can drastically extend the shelf life of mangoes by up to two weeks while reducing spoilage.

Ozone

New Scientist

JUNE 18, 2025

Understanding bubbles better means they could one day be made to contain ozone for food preservation or hold slow-release drugs, he says. “The advantage of this study is the capacity for long duration storage of information in a cold environment, such as in the north or south pole,” says Song.

Ozone

Yale E360

OCTOBER 7, 2021

Ground-level ozone has long been known to pose a threat to human health. Now, scientists are increasingly understanding how this pollutant damages plants and trees, setting off a cascade of impacts that harms everything from soil microbes, to insects, to wildlife. Read more on E360 ?.

Ozone

Yale E360

MARCH 18, 2022

Smoke from bushfires that spread across Australia in late 2019 and early 2020 destroyed high-altitude ozone in the Southern Hemisphere, according to a study that offers new insight into the threat posed by wildfires. Read more on E360 ?.

Ozone

Scientific American

JUNE 25, 2024

Pollution from skyrocketing numbers of satellites burning up in Earth’s atmosphere could threaten our planet’s protective ozone layer

Ozone

Yale E360

MAY 18, 2023

Scientists are worried about the effect this cooling could have on orbiting satellites, the ozone layer, and Earth’s weather. A new study reaffirming that global climate change is human-made also found the upper atmosphere is cooling dramatically because of rising CO2 levels. Read more on E360 →

Cooling

Inside Climate News

MARCH 17, 2022

New research warns that wildfire emissions could unravel progress made under the Montreal Protocol to shrink atmospheric ozone holes.

Ozone

Inside Climate News

JUNE 23, 2021

By Bob Berwyn After sampling the atmosphere above the Arctic for more than a year during the MOSAiC research voyage , climate scientists say the ozone layer, Earth’s protection against intense ultraviolet radiation, is at risk, despite the progress made in protecting atmospheric ozone by the 1987 Montreal Protocol , the global treaty that banned ozone-harming (..)

Ozone