ID 244424188 © Anastasiasamal | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
aqi air quality index toxic standard protection environment serious respiratory health root risk pollution monitoring warning acceptable limit level illness high hazard location background alert word dust clean category guide cause cubes concentration guideline factory emission green danger breath caution effect wooden smoke smog