A History of Short Words

From the New York Times Crossword Puzzle

EPA

Mon, 25 Oct '21
Smog-monitoring org.
Tue, 5 Oct '21
Emissions control grp.
Mon, 19 Jul '21
Clean air and water org.
Sun, 18 Jul '21
Fuel economy authority, for short
Fri, 9 Jul '21
Org. with an Office of Air and Radiation
Fri, 21 May '21
Org. established partly in response to Rachel Carson's "Silent Spring"
Wed, 12 May '21
Org. that launched WaterSense in 2006
Sun, 25 Apr '21
Org. with lots of money to waste?
Tue, 6 Apr '21
Org. since Nixon's presidency
Sun, 7 Mar '21
Org. that takes the lead on lead?
Sun, 28 Feb '21
Cleanup grp.
Sat, 20 Feb '21
Org. with resources on smart growth
Wed, 17 Feb '21
Antipollution org.
Tue, 16 Feb '21
Org. that monitors air quality