Question

Why should public have awareness about Environmental protection acts?

Answer 1

Dear friend
Please find below the solution to the asked query:        
Impacts of sand mining on Environment
1.  For thousands of years, sand and gravel have been used in the construction of roads and buildings. Today, demand for sand and gravel continues to increase. 
2.  Excessive instream sand-and-gravel mining causes the degradation of rivers. Instream mining lowers the stream bottom, which may lead to bank erosion. Depletion of sand in the streambed and along coastal areas causes the deepening of rivers and estuaries, and the enlargement of river mouths and coastal inlets. 
3.  It may also lead to saline-water intrusion from the nearby sea. The effect of mining is compounded by the effect of sea level rise. Any volume of sand exported from streambeds and coastal areas is a loss to the ecosystem.
4. Excessive instream sand mining is a threat to bridges, river banks and nearby structures. Sand mining also affects the adjoining groundwater system and the uses that local people make of the river.
5.  Instream sand mining results river bed degradation, bed coarsening, lowered water tables near the streambed, and channel instability. Continued extraction may also cause the entire streambed to degrade to the depth of excavation. 
6. Hence, it becomes necessary to monitor the usage of illegal sand mining to protect the river habitat and ecosystem

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