Factorio Command: Remove all trees in 5000 tile radius

gistfile1.lua

/c 
pos = game.player.position 
area = {{pos.x - 5000, pos.y - 5000}, {pos.x + 5000, pos.y + 1.5}} 
for _, entity in pairs(game.player.surface.find_entities_filtered{area = area, type = "tree"}) do 
  entity.die() 
end

bless you

edit: this worked better

/c for _, entity in ipairs(game.player.surface.find_entities_filtered{ area={{game.player.position.x-1000, game.player.position.y-1000}, {game.player.position.x+1000, game.player.position.y+1000}}, type="tree"}) do entity.destroy() end