When the Soviet Union collapsed in the early 1990’s, food production on the island of Cuba was disrupted—as the supply of Russian fertilizers, pesticides, tractors, and oil dried up. Under the stress of an imminent food crisis, the island quickly rebuilt a new form of diversified farming—including many urban organic gardens—that depended less on imported synthetic chemicals. Over the last two decades, Cuba blossomed into a world-class showcase of conservation agriculture, with improved soils and cleaner water.
Click here for original story, In Cuba, cleaner rivers follow greener farming
Source: Phys.org