We explore an innovative pay-to-grow scheme that is helping to encourage tree growth in Sierra Leone’s capital city. Plus, Stockholm’s Battle of the Elms and making a greener Denver.

Melbourne’s Metro Tunnel and Mexican architect Tatiana Bilbao’s view on housing
29:21

Tall Stories 493: The Tallinn Song Festival Grounds
07:10

Urban lessons from the World Economic Forum and the Holcim Foundation Awards
34:19