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.
Full Definition of BEHAVIOR. 1. a: the manner of conducting oneself b: anything that an organism does involving action and response to stimulation c: the response of an individual, group, or species to its environment. 2. : the way in which someone behaves; also: an instance of such behavior. 3.