1. air pollution
Wikipedia definition
2. Air pollutionAir pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or cause damage to the natural environment or built environment, into the atmosphere. The atmosphere is a complex dynamic natural gaseous system that is essential to support life on planet Earth. Stratospheric ozone depletion due to air pollution has long been recognized as a threat to human health as well as to the Earth's ecosystems.
Read “Air pollution” on English Wikipedia
Read “大気汚染” on Japanese Wikipedia
Read “Air pollution” on DBpedia


to talk about this word.