Because recycled paper is manufactured mainly from recovered discarded paper, not only does it not require cutting down additional trees, in the production process it produces 75 % less air pollution and 35 % less water pollution. Thus Yuen Foong Yu was in the lead in putting it out as early as 1985.
鑑於再生紙主要是由回收後的廢紙製成，不僅不必多砍樹木，同時在製造過程中更可以減少百分之七十五的空氣汙染及百分之卅五的水汙染，因此永豐餘早在民國七十四年就在國內率先推出。