The Pentagon has requested that the planes treat more than 6 million acres throughout the Houston area. The Air Force noted that the current effort is “expected to significantly surpass previous [spraying] missions in scope,” specifically the spraying campaigns that followed Hurricanes Katrina and Rita.

Naled is a known neurotoxin in animals and humans, as it inhibits acetylcholinesterase—an enzyme essential to nerve function and communication—and has even been known to have caused paralysis. Mounting scientific evidence, including a recent Harvard study, has also pointed to Naled’s responsibility for the mass die-off of North American bees. Just one day of Naled spraying in South Carolina killed more than 2.5 million bees last year.

Read more here: EcoWatch : U.S. Air Force Is Spraying 6 Million Acres With Chemicals in Response to Harvey