By: Trae Erpenbach
Population density - measurment of population in a area unit.
Plate tectonics - the large scale movement of earths plates that cause earthquakes.
Transboundary pollution - starts in a country but spreads through the air to other countries.
Outsourcing - transferring one countries work to another's because the labor is cheaper.
Subsistence farming - self-sufficient farming where the farmers focus on growing food to feed themselves and their families.
Commercial farming - crops are grown for the profit, and to sell at markets.