it will take 5-10 million years for natural speciation to rebuild the biodiversity we are likely to destory during your lifetime.
物種的價值：instrumental value(economic ,ecological services, genetic information, recreational pleasure).
the value of eco-tourism
fuss大驚小怪;小題大作
ailment 病痛
ingredient組成部分
synthetically以合成方法
Are we ethically obligated to prevent premature extinction?
intrinsic or existence value存在價值
master-piece傑作,名作，絕無僅有的人(或事物,行為)
crucible嚴酷的考驗
