For example, factories can choose the relatively more expensive but less polluting metal, cadmium, to replace the more toxic compounds most commonly used by plastics manufacturers at present.
例如工廠可以選擇價格較高、汙染較少的金屬鎘，代替目前塑膠工廠最常用的「硬脂酸鎘」來做為塑膠安定劑，防止塑膠因日曬變型。