Butyl rubber and EPDM (ethylene propylene diene monomer - a synthetic rubber) are the two best flexible liners for water garden construction. Each of these materials is UV stable and should last 20 years or more. EPDM and butyl rubber are generally available in 45 mil and 60- or 30-mil thicknesses, respectively.
human behavior. The capacity of mental, physical, emotional, and social activities experienced during the five stages of a human being's life-prenatal, infancy, childhood, adolescence, and adulthood.
Definition of behavior. 1  1a : the manner of conducting (see 2conduct 4) oneself criminal behavior normal adolescent behaviorb : anything that an organism does involving action and response to stimulationc : the response of an individual, group, or species to its environment They are studying the behavior of elephants in the wild.