Going beyond a definition, our "What is" series offers concise insights into key forest-related topics. Download "What is closer-to-nature forestry?" Download "What is forest assisted migration?" Download "What is a habitat tree?" Download "What is agroforestry?" Download "What is urban forestry?" Download "What are ecosystem services?" Download "What are payments for ecosystem services?" Contributors: Rik De Vreese, Helga Pülzl, Elisabeth Schatzdorfer, Ian Whitehead, Magda Bou Dagher Kharrat, Sven Wunder, Andreas Schuck
