Aerial drones are emerging as an effective tool for environmental monitoring and enforcement because of their ability to reach areas that would be otherwise inaccessible or cost-prohibitive. However, the regulatory framework has not developed as fast as the technology, raising concerns. As EPA and other agencies consider using drones to monitor industrial sites and farmland, many landowners claim it would be an invasion of privacy. Using drones for inspections also raises legal questions about information obtained from drone flyovers and the associated evidentiary requirements.