https://padlet.com/fabianarauz16/fl5nx1poz9gj en-us 2018-09-20 12:07:00 UTC 2023-03-27 15:51:32 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Soccerball.png fabianarauz16 https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283848525 Air pollution occurs when harmful or excessive quantities of substances including gases, particulates, and biological molecules are introduced into Earth's atmosphere.]]> 2018-09-20 12:15:08 UTC https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283848525 fabianarauz16 https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283852708 2018-09-20 12:23:59 UTC https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283852708 fabianarauz16 https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283853685 An air pollutant is a material in the air that can have adverse effects on humans and the ecosystem. The substance can be solid particles, liquid droplets, or gases. A pollutant can be of natural origin or man-made. Pollutants are classified as primary or secondary.]]> 2018-09-20 12:25:50 UTC https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283853685 fabianarauz16 https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283854964 2018-09-20 12:28:15 UTC https://padlet.com/fabianarauz16/fl5nx1poz9gj/wish/283854964