Complex sentence: Dr. Stein founded and served as co-chair of a local recycling committee in Lexington that was approved by the Board of Selectmen and constructed a "Healthy People, Healthy Planet" teaching program.
Split into simpler sentences: Dr. Stein founded and served as co-chair of a local recycling committee in Lexington that was approved by the Board of Selectmen. They also developed a "Healthy People, Healthy Planet" teaching program.