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Image Source : PTI A pump attendant writes the current prices at a fuel station in New Delhi.  The price of diesel sold to bulk users has been hiked by about Rs 25 per litre in line with a near 40 per cent rise in international…

As much as a third of the world's population does not have access to clean drinking water, according to some estimates, and half of the population could live in water-stressed areas by 2025. Finding a solution to this problem could save and…