参考答案

正确答案：D
解析：题目问：人类活动对环境造成了哪些破坏?第一段“Humans are thought to be responsible for awhole host of environmental problems，ranging from global warming to ozone depletion．What is not indoubt，however，is the devastating effect humans are having on the animal and plant life of the planet．”通过这段话可知，人类要对一系列的环境问题负责，从全球变暖到臭氧层的消耗。然而，我们确定的是人类正在对地球上动植物进行毁灭性的破坏。据此判断，答案是D。