CETESB - Environmental Sanitation Company, President- Director of the Expanded Center Environmental Educational Nucleus of São Paulo City The urbanization of São Paulo City (Brazil) is denoted by an unbalanced occupation of the urban area without a planning policy which led to an unstructured growth where speculative behaviors prevail over social function and urban soil. The intensity and characteristics of this urbanization gave rise to two major problems in the end of the last century and the beginning of this one such as urban and environmental issues. The accelerated and disorganized urbanization, population concentration and economical activities within the area and technological standards of industrial production have reinforced a highly degraded environmental picture.