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2. Rubber mulch - Wikipedia

   en.wikipedia.org/wiki/Rubber_mulch

   Rubber mulch typically consists of waste tire bits or nuggets of synthetic rubber obtained from tires that have been shredded or ground up whole, with their steel bands removed. This process can involve the use of various types of tires, including those from passenger vehicles, large trucks, and trailers. The resulting rubber mulch bits or ...

3. Mulch - Wikipedia

   en.wikipedia.org/wiki/Mulch

   Bark chips applied as mulch. A mulch is a layer of material applied to the surface of soil. Reasons for applying mulch include conservation of soil moisture, improving fertility and health of the soil, reducing weed growth, and enhancing the visual appeal of the area. A mulch is usually, but not exclusively, organic in nature.

4. Del Amo (Superfund site) - Wikipedia

   en.wikipedia.org/wiki/Del_Amo_(Superfund_site)

   The Del Amo Superfund Site, located in southern Los Angeles County between the cities of Torrance and Carson, is an 280-acre (110 ha) site at the former location of a synthetic rubber manufacturing plant that was in operation from 1942 until the late 1960s or early 1970s.

5. Crumb rubber - Wikipedia

   en.wikipedia.org/wiki/Crumb_rubber

   Rubberized asphalt is the largest market for crumb rubber in the United States, consuming an estimated 220 million pounds (100 kt), or approximately 12 million tires annually. [2] Crumb rubber is also used as ground cover under playground equipment, and as a surface material for running tracks and athletic fields. [2]

6. What is it the red fire retardant dropped by planes to fight ...

   www.aol.com/red-fire-retardant-dropped-planes...

   A study by researchers at the University of California, Los Angeles, published last year claimed that long-term fire retardants contained heavy toxic metals. The manufacturer of Phos-Chek, which ...

7. Playground surfacing - Wikipedia

   en.wikipedia.org/wiki/Playground_surfacing

   Poured rubber surfacing: This is a seamless rubber surface composed of two layers that is poured in place (PIP). The first layer, or "wear layer", is typically 3 ⁄ 8 inch (9.5 mm) thick and made of EPDM or TPV granules. The second layer, or "cushion layer", is 1–5 inches (25–127 mm) thick and made of crumb rubber or recycled rubber tires.