(best examples and good practices) on household organic waste ...

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Compost soil pollution
Pollution of soils is mainly due to the addition of salts, heavy metals <strong>and</strong>
different organic compounds. The soil changes <strong>and</strong> becomes toxic to the plants
while heavy metals such as e.g. lead, zinc <strong>and</strong> copper, become part of the food
chain <strong>and</strong> lead to toxic crops. If the bioavailability is high, these compounds
can cause contamination in the whole food chain. Some of these substances are
easier to mobilize by water or plants than others. This is a serious concern <strong>and</strong>
sound practice requires controlling impacts through i) analysis of composts, ii)
development <strong>and</strong> enforcement of l<strong>and</strong> application st<strong>and</strong>ards <strong>and</strong> iii) research
<strong>and</strong> development on pre-processing <strong>and</strong> process control mechanisms to limit
or reduce contaminants. (United Nations Environment Programme. 2010)