Union of Concerned Scientists

MARCH 23, 2023

NO x also contributes to the formation of ozone (or “smog”), another toxic pollutant. The EPA’s Social Cost of Carbon was adjusted to 2025 to align with the emissions year of the NO x and SO 2 estimates.) A recent study found that more than 99 percent of the global population is exposed to unsafe levels of PM 2.5 micrometers or less.

Fossil Fuels 197

Fossil Fuels 2023 Clean Energy Nitrogen Oxides 197

PA Environment Daily

FEBRUARY 14, 2025

The last Exceptional Air Quality Event DEP documented was in November 2017 related to elevated ozone pollution concentrations originating from the upper Midwest in May 2016 that impacted ozone pollution readings in Pennsylvania. Posted: February 14, 2025] PA Environment Digest Click Here for a copy of the analysis.

Nitrogen Oxides 53

Nitrogen Oxides 2023 Clean Air Act Ozone 53

PA Environment Daily

OCTOBER 14, 2021

On October 14, the Department of Environmental Protection presented a proposed regulation that would adopt California’s existing Zero Emission Vehicle Program that requires 22 percent of the new passenger and light duty vehicle fleets offered for sale in the state be zero emission vehicles starting in model year 2025.

Nitrogen Oxides 52

Nitrogen Oxides Regulations 2025 Ground-Level Ozone 52

PA Environment Daily

NOVEMBER 5, 2021

The Department will re-evaluate this suspension of enforcement no later than July 31, 2023, to determine if the Program is needed to assist the Commonwealth in attainment and maintenance of the National Ambient Air Quality Standards in areas of this Commonwealth and the Ozone Transport Region.

2002 40

2002 Clean Air Act Ozone 2005 40

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 113

Clean Air Act Ground-Level Ozone Carbon Dioxide Natural Gas 113

PA Environment Daily

JANUARY 24, 2025

The Environmental Quality Board published notice in the January 25 PA Bulletin inviting comments on proposed corrections to regulations setting RACT requirements for major sources of NOx and VOCs related to meeting the ozone pollution standard may affect natural gas-fired power plants. Of Health, Penn State Project ECHO Host Feb.

Natural Gas 78

Natural Gas Regulations Ozone 2018 78

HumanNature

MARCH 31, 2021

In October 2020, the group presented a comprehensive outline of economically viable best practices for the oil and gas sector (the largest source of black carbon in the Arctic) that could help reduce the emission of short-lived climate pollutants, including black carbon, by up to 70% by 2025 (Arctic Council 2020). Arctic Council.

Atmosphere 52

Atmosphere 2020 Carbon Emissions 2012 52

Union of Concerned Scientists

OCTOBER 15, 2024

For more on other harmful aspects of Project 2025, see this blog. The Heritage Foundation’s blueprint—Project 2025—to dramatically alter the US Environmental Protection Agency should concern you. Project 2025 takes aim at all those protections. Project 2025 takes aim at grants, as well. It does me.

2025 317

2025 Ground-Level Ozone Air Pollution Climate Change 317

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 278

2003 2023 2014 Greenhouse 278

Law and Environment

AUGUST 1, 2023

and ozone are important EJ issues. and ozone disproportionately impact EJ communities. and ozone NAAQS will thus be an important test of the political power of the EJ community. Specifically, with respect to PM 2.5 , WHEJAC recommended that the annual primary standard be lowered to 8.0 As WHEJAC notes in its letter, both PM 2.5

Ozone 130

Ozone Politics 2024 2025 130

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 192

Nitrogen Oxides Air Pollution 2029 2024 192

Environmental Progress

SEPTEMBER 12, 2020

Between 1980 and 2018, US carbon monoxide levels decreased by 83 percent, lead by 99 percent, nitrogen dioxide by 61 percent, ozone by 31 percent, and sulfur dioxide by 91 percent. By 2025, the US will close twelve reactors, which constitute 10.5 The US could lose half to two-thirds of its nuclear energy over the next decade.

2020 95

2020 Air Pollution Climate Change Natural Gas 95

Columbia Climate Law

DECEMBER 2, 2019

Methane also contributes to the formation of ground-level ozone which is itself a heat-trapping greenhouse gas and, when inhaled by humans, can trigger a variety of health problems from throat irritation and coughing to bronchitis, asthma, and reduced lung function.

Regulations 52

Regulations Natural Gas Air Pollution Ground-Level Ozone 52

Law Columbia

MARCH 13, 2023

The Obama Administration set the first vehicle GHG emissions standards in 2010 for vehicles manufactured in model years 2012 through 2016, and set revised standards in 2012 for model years 2017 through 2025. In many of the states challenging EPA’s emissions regulations, local governments are leading the fight against climate change.

Clean Air Act 59

Clean Air Act Air Pollution Climate Change Regulations 59

ESA

APRIL 25, 2022

The administration also released plans to approve 48 renewable energy projects on public lands by the end of fiscal year 2025 and double renewable energy production on public lands by 2023. EPA – Public Meetings of the Clean Air Scientific Advisory Committee Ozone Panel (April 29).

2022 98

2022 Ocean Climate Change Regulations 98

ESA

APRIL 11, 2022

BRUSSELS — The world can avoid the worst consequences of climate change, but emissions need to peak by 2025, the U.N.’s Even 2 degrees becomes unlikely without a peak by 2025. EPA – Public Meetings of the Clean Air Scientific Advisory Committee Ozone Panel (April 29). We are at a crossroads. Stopping warming at the lower 1.5-degree

2022 98

2022 Fossil Fuels Clean Water Act Climate Change 98

ESA

OCTOBER 11, 2022

EPA determines that most Chesapeake Bay watershed states are not on track to meet 2025 pollution reduction commitments. States not on track to meet 2025 Chesapeake Bay goals, says report – Virginia Mercury. EPA – Public Meeting of the Chartered Clean Air Scientific Advisory Committee (CASAC) and CASAC Ozone Review Panel (Nov.

2022 75

2022 Clean Water Act 2027 Ocean 75

ESA

JUNE 14, 2021

3540 ), which reauthorizes NOAA’s Chesapeake Bay Office through 2025. EPA – 2021 Annual Joint Meeting of the Ozone Transport Commission and the Mid-Atlantic Northeast Visibility Union (June 15). John Sarbanes (D-MD) introduced the Chesapeake Bay Science, Education and Ecosystem Enhancement (SEEE) Act ( S. 1816 & H.R.

2021 98

2021 Endangered Species Act Ocean Climate Change 98

ESA

MAY 15, 2023

USGS : The agency, in collaboration with Canadian and Mexican agencies and the Udall Foundation, is preparing a two-year (2023–2025) regional assessment of biodiversity and climate change, culminating in the first-ever assessment report addressing these two challenges together for the United States, Canada, Mexico and U.S. territories.

2023 92

2023 Endangered Species Act Climate Change Ocean 92

Law Columbia

DECEMBER 18, 2024

It is likely that President Trump and the incoming Congress will seek to make similar use of the CRA in 2025. The Environmental Protection Agencys final rule (October 10, 2024) regulating ozone-depleting substances. Here, too, the CRA was used in the environmental context to invalidate Trump-era deregulatory actions.

2024 59

2024 Environmental Protection Ozone Conservation 59