Officials in Red Hill, Colorado, say they have a safe plan to wipe out invasive weeds, but some locals are concerned

Soon, weed-killing chemicals will start falling from the sky over the Red Hill area of Boulder county, Colorado.

The wildland is known for its biodiversity , home to hundreds of important species and a concentration of rare environmental resources. It is a key habitat for beloved herds of elk and bighorn sheep, with farms and ranchland lying at its base.