Aerosol research focuses on the study of airborne particles, referred to as aerosols, that are suspended in the atmosphere. These particles can come from natural sources such as dust, pollens, and sea spray, as well as from human activities such as industrial processes and vehicle emissions. Aerosols play a significant role in climate change by affecting the Earth's energy balance and cloud formation, as well as in air quality and human health by contributing to respiratory illnesses and cardiovascular diseases. Researchers in this field study aerosol properties, sources, transport, and impacts on the environment and human health in order to improve our understanding of these complex particles and their effects on the Earth's atmosphere.