Students competing in the Area IV Envirothon Tuesday at the Spiritual Center of Maria Stein stand in a pit to look at soil conditions. A total of 350 high school students participated in the annual event. Teams from Fort Recovery, Marion Local and Parkway were among 71 groups testing their knowledge in aquatic ecology, current environmental issues, forestry, soils and wildlife. The four winning teams that will move on to the state competition are Centerville, Franklin teams 1 and 2 and Sycamore No. 1 team from Hamilton County.