The impetus for this movement stems from a variety of issues, such as: a concern over food supply and food security in urban areas; recognition of the health benefits of community-produced vegetables; the social benefits of local gardens; and the sense of community local gardens engender. [...] The concentration of arsenic in the surface soil can also result from the presence of arsenic in the soil parent material and through volcanic eruptions (CCME, 2001). [...] The mobility of copper in soil depends on the soil pH and the content of organic compounds and other minerals with which copper might interact. [...] Most copper exists in the surface layers of the soil mainly due to the recent anthropogenic sources of copper as well as bioaccumulation of the element. [...] The lead concentration of different organs of the plant is different and the translocation of lead from roots to tops is very limited.