If the sin 30° = 0.5, then the cos 60° = 0.5
Vast parts are inaccessible or have harsh winters and/or hot dry summers. It’s costly to access and use the natural resources from the eastern 2/3s of this huge country. While it has rich multiethnic populations, most of the people live in the nearly landlocked, western portion of the country. This vast plain has been the route for numerous invasions from both the east and the west (the last being the Nazis during WW2).
The biological carbon cycle plays a role in the long-term, geological cycling of carbon. The presence of land vegetation enhances the weathering of soil, leading to the uptake of carbon dioxide from the atmosphere.