The National Science Foundation (NSF) is seeking grant proposals for its Environmental Engineering program, which is part of the Environmental Engineering and Sustainability cluster. The program aims to support transformative research that applies scientific and engineering principles to avoid or minimize solid, liquid, and gaseous discharges from human activities, while promoting resource and energy conservation and recovery. Key areas of interest include enhancing the availability of high-quality water supplies, and investigating the fate and transport of contaminants of emerging concern in air, water, solid waste, and soils. Proposals should address the novelty and potentially transformative nature of the proposed work, as well as its importance in terms of engineering science and potential impact on society or industry. The typical annual award size for the program is around $110,000 per year, with a duration of one to three years. Principal Investigators requesting a higher amount must consult with the Program Director prior to submission. The program also considers proposals for Conferences, Workshops, Supplements, Rapid Response Research (RAPID), and Early-concept Grants for Exploratory Research (EAGER), which must be discussed with the Program Director before submission.