• 15 US states and a Texas county sued the FAA over environmental review.
• The review allegedly failed to analyze potential safety risks and environmental impacts.
• The FAA's proposal would allow certified drone operators to fly beyond visual line of sight.
• Drone delivery operations are already happening in several states under waiver process.

This lawsuit may indicate growing concerns about the environmental and safety implications of expanded drone operations. The FAA's proposal could significantly expand the use of drones in various industries, which suggests potential cost benefits and increased efficiency, but may also raise concerns about noise and privacy.