Why Sewers Around the World Keep Overflowing

To learn more about this topic, start your googling with these keywords:

Combined Sewer System: Sewers designed to collect domestic sewage and storm runoff in the same wastewater pipe.

Wastewater Treatment Plant: A facility that filters and cleans wastewater before sending it into nearby waterways.

Combined Sewer Overflow: When the wastewater in a combined sewer system exceeds a certain limit, it bypasses the wastewater treatment plant and goes directly into nearby waterways.

Extreme Rainfall: Storms that cause the wettest days of the year in a particular geographic area.

Invasive Species: Any kind of organism that gets introduced to a new environment and causes harm.

Deep Tunnel Project: A $3 billion civil engineering megaproject designed to reduce flooding in the metropolitan Chicago area.

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