Rainwater harvesting involves the collection and storage of rainwater utilizing a rainwater harvesting system. In most cases, rainwater is collected from roofs or other exposed surfaces and then directed to a storage tank, groundwater well, or aquifer for subsequent use.

Stormwater harvesting is similar but not the same as rainwater harvesting. Stormwater harvesting involves the collection and storage of stormwater, generally from creeks, streams, roads, parking lots, parks, golf courses, and similar sources.

In both cases, the rainwater can be used for irrigation, recharging aquifers and grounder wells, providing water for livestock, ponds, and if treated, for domestic consumption.

Many cities and communities in California are considering laws that will make it mandatory for all new commercial buildings to be equipped with rainwater harvesting systems.

A microclimate or micro-climate is a local set of atmospheric conditions that differ materially from those in the surrounding area. The area may be of any size, but generally are not large. Sometimes a microclimate exists naturally. Often microclimates are created by land owners who want to convert a hot desert or semi arid area into a cooler, more hospitable area. This would include creating ponds and artificial rock waterfalls, and planting suitable trees and plants. These are known to cool the surrounding areas, thus creating a microclimate. When neighboring property owners do the same, the effect is multiplied. The creation of microclimates also increases the value of desert properties.