合成材料的应用和发展,大大方便了人类的生活,但由于大部分塑料_________________,从而由废弃塑料引发了“白色污染”,要解决“白色污染”问题,可以从以下四个方面着手: ①__________________________________________________________________________; ②__________________________________________________________________________; ③__________________________________________________________________________; ④_________________________________________________________________________ |