The four angels left to go to heaven?
So doesn't that mean their earth, sea, and trees plagues took place first?
...to whom it was given to hurt the earth and the sea.....
And all the angels stood round about the throne...
Did John leave us any clues as to how those four angels ended up with ways to hurt the earth, sea, and trees?
What is the last thing the "another" angel ascending from the east mentions that the four angels can hurt?
So this angel is the one that gave the four angels the trees plague.
The plagues for the earth, sea, and trees were given to the four angels because the "we" angels of Rev. 7 had come from their job in the east that happened in chapter 15. Chapter 15 is the get the plagues place. The seven angels "we" handed them off to the four angels, then those seven went to seal people, and reported the numbers to God.