please help me in welcoming jill jonnes. [applause] >> and here's the book, by the way. >> well, thank you so much, vanessa. it's such an honor to be here and also just to say thank you again to the many people here at the garden over and currently helpful to me as i was working on this book over many years. one other thing i would like to say about my background since i am amid so many scholars is also do have a phd and american history. and that has been really what informed many of my books. so one thing i realized i didn't find out is which way should i be pressing this to go forward? this y.? okay. spirit first you have to put it on. >> all right. so "urban forests", many people say what is that? it seems like an oxymoron. and this is really the answer. i'm guessing many of you here would know that but since most people have never heard of the concept of an armored force, and that is fille honestly what i we this book because i feel like it's so important to our kind of future as citizens are largely living in cities. y

we will kick off our programming this weekend jill jonnes who talks about the use of the trees in city planning.