The City Environment team are considering working with the community to install one weather balloon placed in Churchill Square that will change color based on the average of the AQ monitors (the province is feeding live readings to the city).
Like this one in Paris: http://inhabitat.com/paris-visualizes-air–quality-via-color-changing-balloon/
Here’s open source code to make something like it, we could get more details later:
They’re potentially willing to pay for parts and may be able to help with an honorarium, let us know if you’re interested or know someone who might be.