- Geography is one of the classical earth sciences. It researches the relationships between the Earth and human society as well as those between humans and the environment.
- In order to understand the planet habitat, which is undergoing constant change, it is necessary to regard the Earth as a holistic system, that means within the context of all its various subsystems taken together – the lithosphere (rocks), cryosphere (ice), hydrosphere (water), atmosphere (air), biosphere (plants and animals), pedosphere (soil) and the anthroposphere (living space influenced by humans).