This Biodiversity is reduced because most lawns are composed of one species of a plant, also refered to as mono-culture. It also reduces non-native introduced species which can further decrease biodiversity and vital habitats that are essential to the Eco-system. The use of inorganic materials, such as herbicides, pesticides and fungicides, can harm the environment. With the use of organic lawn management and other ecological techniques, the impact on lawns can be greatly reduced. Some of these methods include higher mowing techniques; the use of sedges, local grasses and low herbs; exclusive compost and organic fertilizer use; low volume irrigation; a pest management program that has been integrated; grass clippings from grass cycling ; and the use of a variety of shrubs, trees, perennials and other plants surrounding the lawn. A healthy lawn prevents erosion of bare dirt, prevents run-off and filters contaminants. -912 Shorted or unvented batteries can cause an explosion. "emergency solar power radio " and "how wind energy creates electricity " (include "homemade magnetic motors", "leveredge wholesale solar ", "electric motor magnetic center ", "adams magnet motor ", "how to make model solar system ", "How to magnetic motor ", 16 Dec 2010 Press release distribution and news syndication service. Affordable press release distribution site. & How windows installer works )