Geography is the study of the earth, but social geography is the study of people and their effects on, and movement around the earth.

Basically, social geography is a sub-topic of geography that only focus' on the human side to it.

Topics of social geography include urbanisation, urban decay, migration and energy.

Human geography covers a wide variety of topics, which include urban, cultural, political, social and economical geography.

The main divisions within human geography reflect a concern with different types of human activities or ways of living. Some examples of human geography include urban geography, economic geography, cultural geography, political geography, social geography, and population geography.

Urban geography is a major topic in human geography because it focuses on understanding the spatial organization and dynamics of cities, which are centers of human activity and development. Studying urban areas helps geographers analyze issues such as population distribution, urban sustainability, social inequalities, and economic opportunities, providing valuable insights into the complexities of human societies and their interrelationships with the environment.

In geography, filtering refers to the process of water moving through soil, removing impurities and pollutants as it travels. This process helps clean and purify the water before it reaches underlying aquifers or rivers.