Delhi air pollution is caused by local pollutants: UK study According to a UK study, Delhi's air pollution is caused by local sources of pollution such as domestic pollution, construction, and traffic. Delhi pollution: According to a UK study, Delhi's air pollution is caused by local sources of pollution. The study was conducted by researchers at the University of Surrey in the UK. The study shows that local sources of pollution including construction, traffic, and domestic heating contribute significantly to high concentrations of harmful air pollutants in the National Capital Region. Researchers noted that efforts to control pollution in the city would need to be made throughout the year, not only in winter, when it reaches its peak, given the dominance of local sources of pollutants. UK Study on Delhi Pollution: Key Features • The study states that about 600,000 deaths in India are due to air pollution and Delhi has the highest levels of air pollution in the world. •