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Glacial damage to hit water
security Your editorial “Glacial damage” (March 8) is very apt and timely. Recently, the Minister of State for Environment, while making a statement in Parliament, stated that there was an accelerated melting of glaciers in the Himalayas, which poses a long-term environmental threat. While thousands of glaciers in these hills are retreating at the rate of 10 to 12 metres a year, the Gangotri glacier is receding at a much faster rate. Outside the polar ice caps, the Himalayan glaciers are a source of the world’s largest supply of water. Excessive melting due to increased human activity and global warming leads to increased water in lakes and flash floods. Excessive sediments affect power generation. In the long run, the receding glaciers will affect water security and cause droughts. It is possible that the huge Indo-Gangetic plain, the granary of India, which is one of the densest populated regions in the world, may turn barren. Devoid of sufficient water, the canals in Punjab and Haryana may contain only sand and gravel. The Thar desert may extend further. You have rightly pointed out that there is lack of enough studies on scientific lines. Micro-level research on glaciers and rigorous data collection and analysis is the urgent need of the hour. L K
MANUJA,
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