Beijing Forestry University has 8 canteens, and the number of people eating every day reaches 15,000  If these people all use disposable chopsticks, it will cost more than 16 4 million chopsticks a year, which is equivalent to destroying 3,200 big trees that have grown for 50 to 60 years
Forest resources are not only protected but not utilized. Appropriate cutting and rational use will promote economic development and forest protection.
 So, the teachers and students of the university appealed to refuse to use disposable chopsticks, and they persisted for 7 years