【正确答案】
D
【答案解析】[听力原文]
The World Wildlife Fund says more than half of the world"s wildlife population has been lost.
The conservation group says this has placed the health of the planet at risk.
The WWF recently released its 10th Flagship Living Planet Report. The group warns the condition of the world"s animals is worse than its earlier reports showed. It says worldwide action is needed.
The WWF says it is worried about the loss of and damage to Earth"s environment. The report provides information about more than 10,000 animal populations from 1970 to 2010. These populations are called "vertebrate species," or animals with backbones—like fish, birds, mammals, amphibians and reptiles.
The report says these populations have dropped by 52 percent in just 40 years. It says freshwater species have fallen by 76 percent.
That is almost twice the loss of land and ocean species. Most of these losses are in the tropics.
The report says the biggest drop has been in Latin America.
What"s the news report mainly about?
[解析] 主旨大意题。新闻首段提出，世界失去了一半以上的野生生物。而下文则更具体的提到动物种群数量减少的具体情况。故选D。