Changing perspective of sustainable development
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Explanation:
The changing perspective
High yield seed varieties were widely popularised as part of the efforts to increase agricultural production, to meet the demands of the increasing population. This was accompanied by wide use of fertilizers and pesticides. In this practice, since the seeds and fertilizers are brought from outside to the agricultural field, this method may be called HEIA (High External Input Agriculture). However, this method was ble agriculture criticized for its heavy expense and its adverse effect on health and environment. Gradually, LEISA (Low External Input Sustainable Agriculture) began to receive wide recognition. LEISA emphasises the perspective that only agriculture with minimum use of external materials can be sustainable. This method allows the use of fertilizers and pesticides in limited quantity, under emergency situations. As a stage ahead, this method envisages NEISA (No External Input Sustainable Agriculture) as a possibility, wherein one's waste becomes the manure for another and therefore sustainable and not dependent on anything from outside.