Piotr Tyszko-Chmielowiec – Arborist, dendrologist, naturalist, educator. Initiator and leader of the national roadside protection program “Roads for Nature” (since 2009), moderator of international cooperation in tree conservation and arboriculture, editor and co-author of textbooks and lecturer. Co-founder of the Tree Institute in Wrocław, Poland. Recently involved in campaigns promoting professional development in arboriculture in Ukraine. A graduate of the Forestry Departments of SGGW in Warsaw and Virginia Tech in Blacksburg (Virginia, USA).