Air pollution occur when harmful substances or gases are released into the air which is harmful to humans, plants and animals.
It is not all human activities that lead to air pollution , some are of natural sources.
The non human activity that lead to air pollution are dust and wildfire, dust occur when a vast land is been swept or blown by wind,volcanic eruption which lead to release of particulate substances,animal digestion I.e digestion of food eaten by animals especially cattle lead to release of methane as waste product which cause air pollution e.t.c
Plastic. Out of all the raw materials for 3D printing in use today, plastic is the most common. ...Powders. Today's more state-of-the-art 3D printers use powdered materials to construct products. ...
