English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

For more than thirty years, numerous coal-fired, electric utility plants have enjoyed “grandfathered” status under the Clean Air Act (CAA), leaving them virtually untouched by the dictates of increasingly stringent air pollution regulation in the United States. The Clean Air Act of 1970, which essentially codified the federal regulatory approach toward air pollution, established a two-tiered framework for the regulation of major stationary sources of air pollution. This approach mandated stricter federal pollution-control technology requirements on power plants built after the passage of new regulatory standards than those applicable to existing plants. This bifurcated approach, often called the “old-new division” in pollution-control regulation, continues to the present day, despite two subsequent rounds of amendments to the CAA in 1977 and 1990. The Clean Air Act Amendments of 1977 introduced two programs, New Source Review (NSR) and Prevention of Significant Deterioration (PSD), which attempted to narrow the old-new divide in control technology requirements. Any major modification of an old source would render it “good as new” for federal regulatory purposes, leading to the imposition of the same control technology requirements that new sources were obligated to follow in a given area. Despite this subsequent “narrowing,” many old sources, particularly coal-burning utility plants, predominantly located in the Midwest, continue to operate under more lenient pollution-control

Billboards and Big Utilities: Borrowing Land-Use Concepts to Regulate "Nonconforming" Sources under the Clean Air Act