Clean Water Act Endangered Species Act Nitrogen Oxides Ozone 
ESA
APRIL 11, 2022
USFWS issues rare emergency rule listing the Dixie Valley toad as an endangered species. Supreme Court reinstates Trump administration Clean Water Act regulation. USFWS: The agency issued an emergency listing rule, listing the Dixie Valley toad as an endangered species for 240 days, starting April 7.
ESA
APRIL 5, 2021
USFWS: The agency is proposing downlisting the status of the Hawaiian stilt ( Himantopus mexicanus knudseni , also known as ae`o) from endangered to threatened under the Endangered Species Act. Fish and Wildlife Service first listed the species under the Endangered Species Act in 1975.
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