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‘Fossil’ groundwater is not immune to modern-day pollution

Deep well study finds contamination in at least 12,000-year-old water

Scott Jasechko

DEEP WATER  Deep groundwater wells, such as this hand-pumped well in Uganda being operated by water resources scientist Scott Jasechko, can contain mixes of old and young water and traces of pollution.

Merhawi GebreEgziabher

By Thomas Sumner

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