أرسل هذا في رسالة قصيرة: Fixed and mobile PM2.5, CO, and CO2 measurement campaigns in light, dense, and heavy metropolitan vehicular traffic with a low-cost portable air pollution sensing device

           __   __   ______      ___      _____   
  ____     \ \\/ // |      \\   / _ \\   |__  //  
 |    \\    \ ` //  |  --  //  | / \ ||    / //   
 | [] ||     | ||   |  --  \\  | \_/ ||   / //__  
 |  __//     |_||   |______//   \___//   /_____|| 
 |_|`-`      `-`'   `------`    `---`    `-----`  
 `-`