1 sentence

1. 地球上有大约3万亿棵树，或每人约422棵树。

   dì​qiú shang yǒu dà​yuē3 wàn​yì kē shù, huò měi​rén yuē422 kē shù.

   There are about 3 trillion trees on earth, or about 422 trees per person.

   Source: CCMatrix