My potential ideas:
Examine the air quality (ground level ozone) surrounding our school to determine what parts of Maryland are safest to live in due to good air quality. Students could track levels, measure their own exposure, and use that to change transportation policy, like allowing buses to run after they are parked.
Bay level rise and its impact on our school district- students could determine those vulnerable areas of their district, examine possible solutions and costs with implementing them or moving residents.
Health issues surrounding insects- with warmer temperatures insects are emerging early and living longer. Examine scientific publications, collect data on campus, and link that to possible health issues, and what the government should do.