These are the 12 cities with the most trees

There's a global movement to encourage cities to grow more trees and plan more parks. On Wednesday, this year's International Day of Forests encourages urban areas to invest in green spaces.

To get a clearer picture of which cities have the most tree coverage today, MIT's Senseable Lab partnered with the World Economic Forum (WEF) to create Treepedia, a site with interactive maps that show the density of greenery in major cities around the world.