Louisville Magazine

AUG 2013

Louisville Magazine is Louisville's city magazine, covering Louisville people, lifestyles, politics, sports, restaurants, entertainment and homes. Includes a monthly calendar of events.

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TREE TORN Adding trees to a city is a thorny issue. Right now, we don't have enough and it shows. Just getting trees in the ground and keeping them alive can be a pain. Here, we break it down for you: the ins and outs, ups and downs of our rooted friends. Glossary Tree Canopy Often represented as a percentage of the city that has tree cover. Urban heat island A city that is signifcantly warmer than surrounding areas because of land use that removes trees and vegetation. Carbon sequestration The removal of carbon dioxide from the atmosphere. Trees help with this by storing the CO2. Urban Forester Someone who manages and maintains the city's forest, planning what needs to go where. Albedo The refective power of a surface. White refects, while black absorbs, inviting heat. Arborist Someone who focuses on the health and management of individual trees. Evapotranspiration Water evaporates from trees to cool the air. Projected Heat-Related Deaths in Selected Cities by 2099 =250 People LOUISVILLE 19,000 people JACKSONVILLE 8,000 people NEW ORLEANS 1,500 people STORM WATER We're No.1 STORM Man That's Cool,WATER And it's not a good thing. Louisville is heating up faster than any other major U.S. city and a major part of the problem is the weak tree canopy. 48 LOUISVILLE MAGAZINE 8.13 One tree has the cooling effects of 10 air-conditioner units running 24 hours a day. The evapotranspirationshade combination that trees provide will cool us down signifcantly, preventing many of the dangerously hot days we experience. L'eau Yeah Trees flter rainwater on multiple levels (think leaves to roots), preventing fooding and combined sewage overfows.

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