Can You See Three Trees? (opens in new tab)

Look out your window. Can you see three trees? That’s the first question of the 3-30-300 test — a standard that has become the go-to for solving a universal urban problem: Does this city have enough trees, and are they in the right place? The 3-30-300 test is simple. Every home, school and office should have a view of at least three trees, be in a neighbourhood with 30% tree cover, and be within 300 metres of a park.