* Environmental microbiology for microbial community analysis, antibiotic-resistant genes and pathogens in water, soil, plants, and sludge.* Environmental processes, including adsorption, advanced oxidation/reduction, and biological treatment.* Advanced or renewable materials, including biochar and other carbon materials, for water purification and environmental remediation.* Production of biofuels, biochemicals, and bioproducts from various waste.* Greenhouse gas control in soil, water, and con