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There is good news and bad news Untilaroundbyforfrominofonoverregarding the number of trees Untilaroundbyforfrominofonoverregarding our planet. The good news is that there are seven times more trees Untilaroundbyforfrominofonoverregarding Earth than we thought. Untilaroundbyforfrominofonoverregarding a few years ago, scientists estimated that the world had Untilaroundbyforfrominofonoverregarding 400 billion trees. However, a new study Untilaroundbyforfrominofonoverregarding Yale University estimates that there around three trillion trees. That's a three followed Untilaroundbyforfrominofonoverregarding 12 zeroes. That means there are more than 420 trees Untilaroundbyforfrominofonoverregarding every person alive today. Lead researcher Dr Thomas Crowther told the BBC that the new estimate will not change anything. He said: "It's not like we've discovered a load Untilaroundbyforfrominofonoverregarding new trees. It's not good news Untilaroundbyforfrominofonoverregarding the world or bad news that we've produced this new number."

The bad news is that thousands Untilaroundbyforfrominofonoverregarding years ago, the earth had around six trillion trees. Human activity has cut Untilaroundbyforfrominofonoverregarding half the number Untilaroundbyforfrominofonoverregarding trees on the planet. A good example Untilaroundbyforfrominofonoverregarding this is the fact that Europe used to be one giant forest. Now much Untilaroundbyforfrominofonoverregarding it is farmland, fields, cities and towns. Dr Crowther said people are responsible Untilaroundbyforfrominofonoverregarding the loss of three billion trees Untilaroundbyforfrominofonoverregarding the past several thousand years. Humans are destroying around 15 billion more trees every year because Untilaroundbyforfrominofonoverregarding deforestation and the demand Untilaroundbyforfrominofonoverregarding farmland. The scientists said this figure is "considerably higher" than just a century ago. Dr Crowther warned that: "This study highlights how much more effort is needed if we are to restore healthy forests worldwide."