Population Density: The number of individuals living within a given area's unit measurement (such as square kilometers). Higher population density often indicates more concentrated human activity.
Economic Development: The sustained increase in real income per capita along with improvements in living standards and quality of life due to factors like industrialization, trade expansion, technological advancements, etc.
Sustainability: Meeting present needs without compromising the ability of future generations to meet their own needs. Sustainable growth ensures long-term environmental preservation while supporting economic and social progress.