Nitrogen Oxides Ozone Pollution Control 
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. Secondary PM 2.5 In comparison, PM 2.5
Union of Concerned Scientists
JUNE 17, 2025
After slowing new purchases during the Great Recession, railroads bought a large volume of new locomotives, both to replace aging stock and to avoid stronger pollution controls. This activity leads to harmful articulate matter pollution (PM 2.5 ) and smog (in the form of ozone, O 3 ), which impacts health.
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PA Environment Daily
MARCH 15, 2023
Environmental Protection Agency announced the final Good Neighbor Plan , a rule that will significantly cut smog-forming nitrogen oxide pollution from power plants and other industrial facilities in 23 states.
PA Environment Daily
JANUARY 24, 2023
The locomotives at issue in this settlement burn diesel fuel which produces significant emissions of nitrogen oxides (NOx) and fine particulate matter. NOx is a contributor to the formation of summer ozone, and particulate matter smaller than 2.5 microns has been shown to cause lung damage and cancer.
PA Environment Daily
SEPTEMBER 1, 2022
The company’s actions allegedly violated the Clean Air Act’s prohibition on the sale of so-called “defeat devices,” which are designed to “bypass, defeat or render inoperative” a motor vehicle engine’s air pollution control equipment or systems. The Keystone settlement, at $2.5
The Energy Law
SEPTEMBER 15, 2011
By: Lesley Foxhall Pietras On August 8, 2011, the Environmental Protection Agency (EPA) published a far-reaching Clean Air Act rule intended to address the interstate transport of sulfur dioxide (SO2) and nitrogen oxides (NOx) from upwind to downwind states. See 76 Fed. 48208 (Aug.
PA Environment Daily
DECEMBER 14, 2022
This exceedance is a violation of Shell’s plan approvals ( PA-04-00740A , PA-04-00740B , and PA-04-00740C ) and the Pennsylvania Air Pollution Control Act and regulations. DEP is authorized under the Air Pollution Control Act to order compliance where appropriate.
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