Have all of the ‘likely significant environmental effects’ of the Plan and all ‘reasonable alternatives’ been identified, described and evaluated?
A yw holl ‘effeithiau amgylcheddol arwyddocaol tebygol’ y Cynllun, a’r holl ‘ddewisiadau amgen rhesymol’ wedi’u nodi, eu disgrifio a’u gwerthuso?