Why? To make Paris the symbol of 21st century sustainable development. Trees would remove 87.8 tons of carbon dioxide from the air in the city of lights.
Cost? The project would cost 72 million Euros - about 97 million US dollars.
Concerns? The lights installed less than an decade ago will have to be changed out with a LED version. Structural issues, including the weight of the plant materials would be 378 tons and the irrigation system need to keep the plants hydrated have been included in the proposal.
Gonna happen? Probably not. Mayor and city officials seem to be backing away from the plans.