This morning I was doing research for Sameunderneath, when I found this completely unrelated article:
Basically…
The balloon changes colors depending on pollution levels in the air. Green is crystal clear air, light green is clean, yellow is moderately icky, orange is breathe shallowly, and red is put-on-your-gas-mask. It also displays the air quality at major traffic intersections, so you know where to hold your breath.
Some neat facts:
- It can be seen as far as 12 miles away.
- It actually functions as a balloon and can lift as many as 30 passengers up to 150 meters above the city.
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