As part of this week’s Earth Day activities, fifteen teams of Iowa high school students are tromping around Springbrook State Park near Guthrie Center today in the annual Iowa Envirothon contest. Aaron Putze , spokesman for the co-sponsoring Iowa Farm Bureau, says activities and discussions will focus on ways the students can help protect the state’s natural resources. Students will be able to showcase their skills in subjects including: aquatics, forestry, wildlife, soil conservation and current environmental issues. Putze says the teams will go to a variety of stations situated around the park to demonstrate their knowledge and abilities.Teams are made up of four or five students each. This is the eighth annual Iowa Envirothon and Putze says it’s vital that these young people take part.The first place team will represent Iowa at the National Envirothon in Maryland in July. Teams competing today are from: Decorah (3 teams), Terril, Hull, Northwood, Marshalltown, Orient, Grundy Center, Winterset, Waverly, LaPorte-Dysart, Corning, Perry and Iowa City.