The U.S. National Science Foundation (NSF) is offering a federal grant opportunity titled "Atmospheric Chemistry," aimed at supporting research on the atmospheric processes involving gases and aerosols. This program encourages proposals that explore various aspects of atmospheric chemistry, including the sources, sinks, transport, and transformation of atmospheric constituents, as well as the development of models and experimental methods to study these phenomena. The grant is open to unrestricted applicants and does not require cost-sharing or matching funds, making it accessible to a diverse range of researchers and institutions. Proposals can be submitted at any time, and interested parties can reach out to NSF grants.gov support at grantsgovsupport@nsf.gov for assistance or further information. For additional details, visit the NSF program description at http://www.nsf.gov/funding/pgm_summ.jsp?pims_id=11692.