Technology from Chicago and around the world promises to clean up water. An effort in Illinois is trying to speed it to market while navigating new federal funding challenges.By Leigh GiangrecoWhen it comes to cleaning up dirty water, tiny bubbles can pack a big punch.
Observations from the Little Bunker
Last updated: December 25, 2025 02:10 PM
Atmospheric CO₂
427.2 ppm
+17.9
ppm/year
Atmospheric CH₄
1930.95 ppb
+-3.5
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year