read the information below:
in 1840, the population of chicago was only 4,470. by 1900, the city's population was 1,698,575.
which factor contributed most to the population change?
african americans escaping poverty and discrimination in the south
the expansion of chicago's boundaries into surrounding counties
chicago's location as a railroad hub between the east and the west
chicago's improvements in sanitation and health care

the real gdp increased by 4.1%

explanation:

might not be right, i think i'm correct, but i might be thinking of last quarter

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.