the red balloon
Friday, August 8th, 2008
Ballon Air De Paris is a hot-air balloon that changes color according to the level of pollution in the Parisian air.
The colors range from green, when the air is clean, to red, when the air is very polluted.
The balloon can be seen from 20 km away, so all the citizens of Paris know when it’s safe to leave the house as you are and when it’s best to wear a gas mask when taking a stroll outside.
And that’s not the only thing the balloon does! It also offers rides around Paris!