Mark Marlowe, who directs the water supply for fast-growing Castle Rock, a Denver suburb, has a dim view of lawns. Irrigating grass in summer consumes 40 percent of Castle Rock’s water. And unlike water used indoors, outdoor water cannot be recycled.

Marlowe is not reticent in articulating his disdain. Earlier this spring, he told a group of Colorado legislators, “I think of grass in Colorado as an invasive species — something we want to get rid of.”

Read more from Brett Walton with Circle of Blue here.