The Ozone Criteria Document notes that ozone affects vegetation throughout the United States, impairing crops, native vegetation, and ecosystems more than any other air pollutant (US EPA, 1996).
The EPA is taking steps to improve the ozone for local farmers.
mnli hypothesis: The EPA is taking steps to improve the ozone for local farmers. premise: The Ozone Criteria Document notes that ozone affects vegetation throughout the United States, impairing crops, native vegetation, and ecosystems more than any other air pollutant (US EPA, 1996).