With almost no heavy industry on South Island, the air, water, and land are all free of pollution.

南岛上几乎没有重工业，空气、水和土地全都未受污染。

But beneath the South Island, the westward-moving Pacific Plate is crashing into and subducting beneath the northwest-moving Australian Plate.

但是在南岛下方，向西移动的太平洋板块撞击并俯冲到向西北移动的澳大利亚板块下方。