8.1 how are we affecting the earth's biodiversity and why should we protect it?

Human activities are destroying and degrading biodiversity
mowed down割倒
plowed under翻壓
gobbled up吞併，併購
1.人類干擾的土地面積已超過陸地面積83％（南極大陸與格林蘭不計）
填滿溼地，草原森林變更地，都市用地
staggering驚人的
ecological fishprint生態魚跡
2.temperate forest increase, but tropical forest decline
3.aquatic biodiversity: coral reef, commerically valuable marine fish species.
4.premature extinction of species

Why should we protect biodiversity?
intrinsic value
instrumental value-existence value, aesthetic value, bequest value遺贈;遺產