Thousands of residents across parts of South Carolina and North Carolina are facing "unhealthy" levels of air pollution early on Friday morning, according to the Environmental Protection Agency's (EPA) AirNow Map. The map shows a pocket of "unhealthy" ozone and fine particle pollution (PM2.5) encompassing Greenville, Spartanburg, and a portion of neighboring North Carolina. When air quality reaches the "unhealthy" level , EPA guidelines recommend that sensitive groups—which typically include