Category: Clean Air Act

The Environmental Protection Agency intends to issue a rule updating its Clean Air Act emission standards for new and existing municipal solid waste (MSW) landfills to cut methane and other harmful landfill gas emissions. 

The rule follows another Clean Air Act-related proposal the EPA issued in January, designed to reduce emissions of nine pollutants, including smog- and soot-forming sulfur dioxide and nitrogen oxides by approximately 14,000 tons per year at MSW incinerators, as found here.

The EPA expects landfill operators to achieve these standards …

On a clear day, you can’t actually see forever — if you follow the blue sky out to the horizon, you will often see it become somewhat more pale and opaque, owing to ‘visible pollution,’ or “haze” — the result of the interaction of sunlight with particulate matter in the air.

Before the modern industrial age, haze was largely attributed to wind-blown dust, soot from wild-fires, and other types of volatile organic compounds (VOC) released by trees and plants into the atmosphere from America’s vast …

Stationary combustion turbines, often referred to as gas turbines, are used to generate high volumes of electricity at power stations, dams, and industrial centers. Despite their size, noise, and prodigious output, these engines are simple, with a design that dates, at least in concept, all the way back to 150 BC when a Greek inventor named “Hero” designed a ‘toy’ sitting on top of heated water, the gases of which caused the toy to spin.

This concept, compressing air and then injecting fuel and heat …

After years of delays – largely due to the COVID-19 pandemic – on April 11, 2023, the U.S. Environmental Protection Agency finally issued two proposals that would reduce ethylene oxide (EtO) emissions affecting fence-line communities neighboring EtO sterilization facilities and establish direct protections for facility employees likely to be regularly exposed to this sterilizing chemical. The proposals, which fall under the Clean Air Act (CAA) and the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), are expected to dramatically reduce EtO emissions by a whopping 80% …

In early January, the U.S. Environmental Protection Agency announced a proposal to revise and strengthen a key national ambient air quality standard (NAAQS) for fine particle pollution, also known as PM_2.5.

The Clean Air Act requires EPA to set two types of NAAQS: health-based standards, called primary standards, and standards to protect public welfare, called secondary standards. Based on the scientific evidence and technical information, EPA has set two primary standards for PM_2.5, which work together to protect public health: the …

In June 1989, then-President George H. W. Bush proposed revisions to the Clean Air Act designed to reduce what were perceived as three of the largest threats to the environment at the time: toxic air emissions, acid rain, and urban air pollution.

More specifically, Section 112r of what became the Clean Air Act Amendments of 1990 required the EPA to publish guidance and regulations for chemical accident prevention by entities using compounds that posed the greatest risk of harm from accidental releases. These regulations were …

As regular readers of this blog know, we have been keeping tabs on the Supreme Court’s review of West Virginia v. Environmental Protection Agency, a case addressing how broadly executive agencies can interpret the legislation authorizing their activities.  Today, the Supreme Court issued its opinion on the matter, holding that the “major questions” doctrine precluded the EPA from using the Clean Air Act to require energy producers to change the type of energy generation they use.

Under Section 111(d) of the Clean Air Act, …