Fourth Plain Forward will celebrate Earth Day from 1 to 4 p.m. April 20 with the installation of “Mother Camas,” carved by Yakama Nation artist Toma Villa, at the intersection of St. Johns Boulevard and Q Street. Mother Camas depicts the narrative of Grandmother Camas, who transformed herself into camas bulbs to save her children from starvation. The event will include free food, vendors and family activities hosted by Columbia Play Project.