Creating permeable landscape as neighborhood treasure in San Francisco.
Permeable Landscaping is that which allows water and air to penetrate the soil. It may be populated with trees, plants, rocks or other natural or manmade materials. It is the natural state of land that permits the earth to “breathe”. When permeable landscape is covered with impermeable surfaces (paving, sidewalks, buildings, etc), water is diverted by way of treatment plants to major waterways (ocean and bay), air cannot reach the soil, excess heat is generated and plants cannot grow. Re-introducing permeable landscape where it has been removed is extremely valuable to the health of cities, and is easily and immediately achievable. It simply requires the removal of impermeable materials and replacement with soil, plant material, rock or porous manmade materials.