Air pollution is the contamination of air due to the presence of substances called pollutants in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. It is also the contamination of the indoor or outdoor environment either by chemical, physical, or biological agents that alters the natural features of the atmosphere. There are many different types of air pollutants, such as gases, particulates, and biological molecules. Air pollution can cause diseases, allergies, and even death to humans; it can also cause harm to other living organisms such as animals and crops, and may damage the natural environment or built environment. Air pollution can be caused by both human activities and natural phenomena.

वायु प्रदूषण रसायनों, सूक्ष्म पदार्थ या जैविक पदार्थ के वातावरण में मानव की भूमिका है, जो मानव को या अन्य जीव जंतुओं को या पर्यावरण को नुकसान is suffered है।