Question

which is an environmental concern? having groundwater affected by a nearby landfill taking plastic containers to a recycling facility running the dishwasher only when it is full treating and processing water for a community

Explanation:

Environmental concerns relate to negative impacts on the environment. Groundwater affected by a landfill is a negative environmental impact. Recycling plastic (taking to recycling facility) is positive. Running dishwasher when full conserves water (positive). Treating water for community is a service (not a concern).

Answer:

having groundwater affected by a nearby landfill