20,000 Parmarthi will make 40,000 contour trenches.
The expense upon each person is ₹300.
By donating ₹300, you're supporting one Parmarthi who will construct two contour trenches which will harvest 9000L of water in a single good rain.
₹300 = 1 Halmarthi = 9000 L = Water footprint of 2 days of an urban Indian*.