This study assesses exposure to indoor particulate matter from various indoor and outdoor sources using the computer model CONTAM. The city chosen for this case study is Dhaka, Bangladesh, one of the most polluted cities in the world (Page and Correspondent, 2018) (Dhaka Tribune, 2018). A new global study report released in April 2018 by the Health Effects Institute (HEI), said that although more than 95 percent of the world's population suffers from poor air pollution and breathes polluted air, the main victims of air pollution are the poorest countries. The world is so badly affected by air pollution that, according to this report, approximately 6.1 million deaths worldwide in 2016 were due to this cause alone (healthdata.org, 2018). Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”? Get the original essay According to this report, air pollution is the fourth leading cause of death worldwide, just behind high blood pressure, diet and smoking. However, most of these affected people are residents of low- and middle-income countries, particularly Asia and Africa, where they face very low indoor and outdoor air pollution (Page and Molla, 2018). Global warming is now a serious problem for the world. because it affects the environment in many ways. Air pollution is one of the impacts caused by global warming. Although complex, there is a coherence between air quality and climate change; air quality may be affected by climate change, and climate change impacts air quality (US EPA, 2018). A number of sources are responsible for the production of greenhouse gases and significant air pollutants. Fossil fuel burning, brick production, biomass burning, etc. are notable sources of black carbon production which poses a threat to the climate. As a major air pollutant, black carbon impacts in two different ways. Firstly, it can produce heat in the lower atmosphere by absorbing solar radiation and secondly, by depositing on Himalayan glaciers, it accelerates the melting of glaciers. These two incidents are impacts of global warming. Recent studies have shown that black carbon is the second largest contributor to global warming (Begum, Hopke, & Markwitz, 2013). Due to its topographical location, the climatic effects on Bangladesh are very significant. A number of climate changes have been observed in recent decades due to this global warming. Among these; changes in the duration of seasonal variations, droughts, floods, increased water salinity, and sea level rise are notable (Begum, Hopke, & Markwitz, 2013). Although developed countries play the largest role in the production of greenhouse gases, developing countries also have a growing contribution in this regard. In developing countries; Biomass combustion, vehicle emissions and industry such as brick manufacturing are the main sources of production of major greenhouse gases such as CO2, CO, NO2, black carbon, etc. (Begum, Hopke, & Markwitz, 2013). Particulate matter (PM), whether coarse (10-2.5 µm) or fine (up to 2.5 µm), has a significant impact on climate change and global warming. They can cool or warm the Earth's atmosphere. 405,2010).