In support of local urban greening programs, the 3+30+300 rule (or principle) sets evidence-based guidelines for visible green (seeing at least 3 larger trees from every home, place of work, and school), surrounding green (no less than 30% tree canopy cover in every neighbourhood), and recreational green (at most 300 metres to the nearest, high-quality public green space). Since its launch in early 2021 by the seminar presenter, in the midst of the Covid19-pandemic when the importance of visible and nearby nature became very clear, the rule has been adopted by municipalities, regional and national governments, and international organizations across the world.

Register and More details: https://www.environment.utoronto.ca/events/environment-and-health-seminar-series-330300-rule-greener-and-healthier-cities-background