As they span significant areas of Asia, Europe and the Americas, karst landscapes cover some 15 percent of the Earth’s land mass. Scientists estimate that these areas of porous bedrock are home to as ...
Brine is generally defined as water with a salt concentration higher than 50 parts per thousand, though some brines can be several times saltier Average salinity of the world’s oceans is roughly 35 ...
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Six months ago Cape Town was a city on edge. The mayor had declared that Day Zero, when officials would shut off water to most homes and businesses in order to preserve fast-shrinking reservoirs, was ...