材料的来源之岩石 ............................................... 2
常见的岩石 .......................................................... 3
岩石的用途 .......................................................... 4
金属 ...................................................................... 6
土壤 ..................................................................... 9
陶土 .................................................................... 10
材料的来源之石油 ............................................ 11
塑料 .................................................................... 12
人造布料 ........................................................... 13
5R原则 ............................................................... 14
环保由我做起 .................................................... 15
词汇对照表 .........................................................16

true