In many of Australia's oldest towns and cities, some canopies are reaching the end of their lives, prompting new discussions about what trees might come to define place in the decades, even centuries, to come. Right now, researchers, councils and developers are all having to think about what trees, planted today, will survive a much warmer climate. Jonathan explores this with Michelle Leishman, the lead researcher of the Which Plant Where project. Find more Blueprint For Living via the ABC Listen app or wherever you get your podcasts.