Urban Palls is a term used to describe the air pollution that is found in cities. It is caused by the burning of fossil fuels, such as coal and oil, which releases pollutants into the atmosphere. SMOGS is an acronym for 'Smoke and Oxides of Gas, ' which are two of the main components of urban palls. These pollutants can have serious health effects on people living in cities, including respiratory problems and increased risk of cancer.