According to a new study by the Stockholm University, over the past two hundred and fifty years , 571 plant species have completely disappeared from the earth . This is twice as many compared to the species of birds, mammals and amphibians taken together that have become extinct for the same period.
But the problems, apparently, are just beginning. As the researchers say, the rate of death of plants increased five hundred times after the start of active human intervention in the balance of nature. Of the ninety thousand species that have been studied by experts, a third is at risk.
The authors of the study say that many people would easily call an extinct bird or mammal, but in the case of plants they are lost. Scientists decided to pay attention to this problem.
Now, experts have established, plants in tropical regions and the Mediterranean climate are especially vulnerable.