Speak with Seereth Stonebreak in the Stonetalon Mountains.
The spirits of the Stonetalon Mountains are angered, for goblins and their servants are plundering and burning the land. So the land has cried out, and those who listen for such things... have heard.
Seereth Stonebreak, a promising shaman of the Horde, was sent to Stonetalon. She reports massive deforestation at the hands of the goblins, and requests aid.
Meet Seereth in Stonetalon. To reach her, follow the road west of the Barrens' Crossroads. She is camped near the Greatwood Vale.