Rainwater Harvesting
At the time of this writing, the American Intermountain/Southwest is in the grip of an extensive drought. 100% of the population of the Four-Corners states (Utah, Colorado, New Mexico, and Arizona) and Nevada are experiencing D1 or worse drought, which makes what little water there is that much more precious. And while use of the water in rivers, reservoirs, and aquifers is subject to highly negotiated rights, and the use of wells is dependent on the location of the wells, there is a source of water that is gaining in popularity, despite its irregularity: rainwater.