Plant Extinctions
After analyzing the populations of more than 330,000 seed-bearing plants around the world, the study authors found that about three plant species have gone extinct on Earth every year since 1900 — a rate that's roughly 500 times higher than the natural extinction rate for those types of plants, which include most trees, flowers and fruit-bearing plants. Unsurprisingly, human activity plays a key role in this elevated extinction trend.
The researchers found that, while roughly 1,300 seed plant species had been declared extinct since 1753, about half of those claims were ultimately proven to be false. In the last 250 years, more than 400 plants thought to be extinct have been rediscovered, and 200 others have been reclassified as a different living species. That leaves approximately 571 species confirmed extinct in the last 250 years, vanishing at a rate of roughly 18 to 26 extinctions per million species per year.
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