The long-threatened Yangtze river dolphin in China is probably extinct, according to an international team of researchers. They say this marks the first whale or dolphin to be wiped out because of human activity.
Is expected that the Yangtze river dolphin is extinct, according to the Zoological Society of London. The society participated in an international survey which examined over 1,500 kilometres of the river last year and failed to find a single baiji dolphin. In the 1990s they found thirteen live dolphins. In the 1950s they were thousands.
China's rapid modernisation is blamed for the dolphin's demise. Industrial pollution, heavy river traffic... are thought to have killed so many poor dolphins.
However, the World Conservation Union says that an animal can only be declared extinct if it hasn't been found in the wild for fifty years. So we hope that this nice animal don't desapeere. But even if a number of the dolphins have survived, they and other freshwater animals, like the Yangtze finless porpoise, are in serious danger of disappearing forever because our fault.
BBC NEWS
In my opinion, this is so sad; the world is desappearing because of us, so if we cause the trouble, we have to stop it.
NEW VOCABULARY
* An international survey: a study or report written by people from different countries
* Failed to find a single: didn't find even one
* Demise: end, extinction
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