Ever since the dawn of time, mankind has been conscious of the importance and the wealth of the earth, as the source of many raw materials and 90% of the food supply for human beings and animals.
Today, however, the earth we exploit and on which we live is continuously being attacked, sometimes with irreversible consequences since it is not renewable. On the global level, nearly two billion hectares of land are degraded each year by human activities such as urban sprawl, industrial development, and increasingly intensive agriculture.
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