It already uses around 40 per cent of its rainfall, leaving little to replenish underground reserves or maintain wetlands. (newscientist.com)
Because saltwater has intruded into underground reserves, much of the country's tapwater already tastes slightly salty. (newscientist.com)
The authors propose that the water detected in the RSL is sucked from the thin Martian atmosphere, rather than supplied by underground reserves. (seeker.com)