The Cuyahoga River fire in 1969 sent a wake-up call to the population around Cleveland to start looking out for their environment. Medina's mayor at the time, Bill Lamb (1982-1990), advocated a bill which would beautify Medina over the next decade. This became the Shade Tree Commission. In 1981 Medina was named "Tree City USA", and has maintained the name ever since. Agricultural enthusiast Tom Lincoln, provided some of his land on Fenn Road to host a nursery for trees to be later used in the beautification of Medina. The caretaker of this nursery and the Shade Tree Commission was Harold Thoburn.
Thoburn grew up in Mount Pleasant, Ohio, during the boom of agriculture in the United States. He attended The Ohio State University until he received a masters degree in agricultural education. Afterwards he stayed with OSU, working as an agricultural extension agent in Lorain County for 25 years. Due to his love for the community, Harold helped plan, conduct and carry out the Medina County Fair for 34 years in order to show the importance of agriculture. After his retirement, he increased his participation in Medina County projects to develop a better environment. Such things include the Medina County Park District and the Shade Tree Commission. Due to his endless efforts to improve the community, April 22 is now known as Harold Thoburn Day.