Me again! I'm so happy you're all here. Thanks for letting me nerd out in your inbox week after week.

💙 Amanda

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.

Proposed just a few years ago by Cecil Konijnendijk , the rule has spread quickly. The Italian city of Florence committed to planting 50,000 trees by 2030 under the framework. Fort Collins, Colorado made it a formal planning target .…