Atmospheric composition refers to the different gases and particles that make up Earth's atmosphere. This research area focuses on studying the various components of the atmosphere, including oxygen, nitrogen, carbon dioxide, and other trace gases. Researchers in this field investigate how these components interact with each other and with other parts of the Earth system, such as the biosphere and the oceans. Atmospheric composition research is important for understanding the processes that drive climate change, air quality, and weather patterns. By studying the composition of the atmosphere, scientists can track changes over time, monitor pollution levels, and predict future trends in the Earth's climate. This research area also plays a key role in informing policy decisions related to environmental protection and sustainable development.