Mr vjay kedia article on Blue Water and Green Water is very apt. Green water in aquifers not only givecus sustinence capabilityvwhen Blue water on lands surface is deficient in quantity and quality. Green water with soil moisture is also required to provide cushioning property in the event of e quk tremors etc.. Water in soil keeps soil likeca sponge and absorbs all seismic effects. One shudders to think on the after effects on hard rockier soil with high rise urban buildings.. It is imperative that rain harvesting in aquifers is resorted to.. well wishes from Prof Ajit Seshadri. Vels University. Chennai. INDIA ..