bottle cap, made of polypropylene and polyethylene plastic resin, do not biodegrade. if not recycled, these caps pose danger to

awareness background beverage biodegradable biodegrade bottle cap career circle collection color colorful community concern danger decompose disposal ecology environment environmental friendly garbage green hazard industrial junk life litter management marine material pet plastic pollution polyethylene polypropylene process program recycle recycled recycling resin reuse reused rubbish save separate threat trash treatment waste