Greenhouses produce wastewater from various sources, including their roofs, writes John Bartok Jr. of the University of Connecticut. A rainwater harvesting system or the use of grass or stone-lined swales to direct the water to a detention pond or wetland can help alleviate the problem, he notes. Gardeners also need to take steps with driveways and indoor and outdoor plant-watering to prevent polluted runoff.

Related Summaries