1 季节
26 插曲
Extreme Environments - Season 1 Episode 22 第 22 集
Our planet’s untouched natural environments are shrinking, due to pressure from human populations. As these areas decline, the creatures adapted to live in them face a decline in numbers, and sometimes even extinction altogether. Many biologists believe that if we don’t act quickly, half the world’s species will be gone in 100 years. A report called the Living Planet Index reveals that from 1970 to 2000, populations of terrestrial and marine species dropped by 30 percent, while freshwater populations went down by a massive fifty percent.
- 年: 2006
- 国家:
- 类型: Documentary
- 工作室: Discovery
- 关键词:
- 导向器:
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