Watch this 3rd webinar in our winter series, and hear Keith Sacre (Director of Barcham Trees) and Cecil Konijnendijk (co-founder of the Nature Based Solutions Institute) discuss the concept of tree diversity and its importance in the context of the ‘3-30-300 rule’. The ‘3-30-300 rule’ is an evidence-based rule proposed by Cecil Konijnendijk, which stipulates that everyone should be able to see at least three trees from their home; there should be a 30% tree canopy cover in each neighbourhood; and 300 metres should be the maximum distance to the nearest high-quality public green space. Anybody with an interest in urban trees should find this webinar useful.