After visiting the remains of district 12 what did katniss realize

District 12 is the poorest of the 13th districts in the Panem. Its main economic activity was the extraction of minerals from the coal mines which were located there.

During the rebellion, The Capitol decide to bomb District 12, leaving mass destruction throughout the territory. The site was used as a transportation base to take rebel troops to The Capitol. After the war and upon her return, Katniss decided to build a medicine factory that would help aid the residents who affected by the war.

monitor contract compliance and results of forestry activities to assure adherence to government regulations.  

plan and supervise forestry projects, such as determining the type, number and placement of trees to be planted, managing tree nurseries, thinning forest and monitoring growth of new seedlings.  

establish short- and long-term plans for management of forest lands and forest resources.  

determine methods of cutting and removing timber with minimum waste and environmental damage.  

supervise activities of other forestry workers.

by the way there is no video here.