urban sewers roof rainwater groundwater recharge sea

City sewers can carry roof rain to sea

When sewers carry rain from roofs away instead of letting it soak into the ground, less water can refill underground supplies, and freshwater can flow to the sea. In Belgium, sewerage has been linked with a water-table drop of 100 meters.

Hispaniola's Taíno population fell steeply

Spanish forced labor and enslavement devastated Taíno communities on Hispaniola. Reports put their population at about 400,000 before it fell to 60,000 by 1508 and 26,334 by 1514. A smallpox outbreak killed as many as one-third of those remaining by May 1519. Estimates of the pre-contact population vary widely, so the decline over the century after Spanish arrival is described as up to 95%.

U.S. gun homicide rates dwarfed high-income peers

25×

In 2010 mortality data, the U.S. gun homicide rate was 25 times the rate in other high-income countries. Overall, the U.S. homicide rate was seven times theirs, driven by the much higher gun homicide rate.

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urban sewers roof rainwater groundwater recharge sea

City sewers can carry roof rain to sea

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