Ricky Johnson holds an air quality monitor that will collect samples in the Pleasantville area of Houston, Saturday, Aug. 17, 2024. (AP Photo/Annie Mulligan)
Ricky Johnson and Bridgette Murray, who work to raise awareness of issues caused by pollution, pose in front of a sign for the Pleasantville area of Houston, Saturday, Aug. 17, 2024. (AP Photo/Annie Mulligan)
Ricky Johnson attaches an air quality monitor to a pole inside a monitoring site in the Pleasantville area of Houston, Saturday, Aug. 17, 2024. (AP Photo/Annie Mulligan)
Bridgette Murray poses next to an air quality monitor in the Pleasantville area of Houston, Saturday, Aug. 17, 2024. (AP Photo/Annie Mulligan)