Chrissy Balk,  technical advisor for the Davey Institute, teaches us all about the science of trees, such as how photosynthesis works, how trees help with storm water runoff, how they clean the air and types of fungi and diseases.  We're celebrating Arbor Day all month long with the Davey Planting Project Giveaway! We want to promote tree planting this Arbor Day, so we're giving away tree seeds to anyone and everyone who is interested! All you have to do is email a mailing address to podcasts@davey.com and you'll receive your complimentary seeds in the mail along with planting instructions.  You have until the end of the month to send us an email for your seeds. *Seeds can only be mailed within the U.S.In this episode we cover:Photosynthesis (2:05)Storm water runoff and erosion (3:11)Cleaning the air (4:01)Human benefits (4:33)Trees Chrissy has planted (6:14)How Chrissy started her job (8:27)Fungi (10:55)Diseases (12:05)Tar spots on maple leaves (12:20)Pine Wilt - Pinewood Nematode (13:13)The best part of Chrissy's job (18:22)To find your local Davey office, check out our find a local office page to search by zip code.To learn more about various types of tree fungi, check out our blogs on Tree Fungus. To learn more about common tree diseases, read our blog, Common Tree Pests and Diseases to Look Out for this Spring. Connect with Davey Tree on social media:Twitter: @DaveyTreeFacebook: @DaveyTreeInstagram: @daveytreeYouTube: The Davey Tree Expert CompanyLinkedIn: The Davey Tree Expert Company