Green Thumbs

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On today’s show: Gerald Lordahl takes your questions on end-of-summer gardening! Then, internationally renowned public garden designer Lynden Miller talks about ways to beautify the urban landscape. Also, director Lixin Fan discusses "Last Train Home," about how China’s ascendance as an economic superpower has affected family life. And Underreported examines how hurricane science has changed since Katrina. Plus, our latest Backstory segment looks at how the Citizens United ruling is shaping the 2010 elections.