There's one estimate which suggests that in the United States, two thirds of the land which was once forested and then cleared has become reforested as loggers and farmers have retreated, particularly from the eastern half of the country.
ある推定では アメリカ合衆国の 国土の三分の二は かつて森林で覆われていました その後これが一掃されましたが 林業や農業が撤退すると 特に国土の東半分では 再森林化が進んでいます