Percolation, Not Dams and Roads, Can Protect Water Supply

Dams and reservoirs are an obsolete technology and the shouting for more dams can exacerbate hard water times. Bullet trains make sense; bullet dams do not. In the December issue of Science, researches expounded on the mishandling of numbers; the estimates of how much water evaporates from watersheds around the world missed their mark by a fifth. Reservoirs and flood or furrow irrigation throw most of the precious stuff back into the atmosphere, contributinig to more losses than we had planned for.