THROWN>. Propel something from the hand: to make something move relatively quickly from the hand and through the air 

  The first angel sounds the 1st Trumpet and hail and fire followed mingled with blood, and they were thrown to earth. A third of the trees were burned and all the green grass was burned up.

 Here we are reading that after the 1st trumpet was blown by the first angel in this chapter that 1/3 of all the trees on the Planet were destroyed by fire , as well as ALL , (ALL , GREEN GRASS)  Oh my , all the beautiful grass everywhere on the planet will be gone , burned up !