When comparing the solar density graph to the topography map, it becomes clear the most highly populated areas tend to show less altitude variation (meaning the altitude is constant and mostly flat. This aligns with the criteria set for solar stations. However, these plants are often surrounded by severe altitude variations and mountainous regions. The average longitude and latitude for solar power plants is (40.67814731, -25.71531321) which approximates to be in the east North Atlantic Ocean off of the coast of Portugal. Though this average is by no means the best place to build a solar plant (though we certainly encourage an attempt!), it’s a good indicator of how the solar power plant population is skewed.

             Next, the coal density graph has a strong presence in south and east Asia as well as eastern Europe and the United States. There seems to be no correlation with topography, but if we take a closer look at the criteria set for coal stations - accessible and transportable sites and storage, and a rural location - we begin to see a relationship form. Much of the coal density in the United States is located in the Midwest where a large portion of the total land mass is categorized as rural. This same trend continues for eastern Europe, countries like Ukraine being the largest hotspots. On the other hand, many Asian hotspots occur in the eastern region of China and in India, places that are highly populated by humans. This does not fit within the standard criteria, so what could it mean? Perhaps the reason lies in other factors like political climate and economic demand.

             Finally, wind-based power plants are densely packed in the locations they occur. They dominate much of western Europe, northern China, southern India, eastern Brazil, and the United States. Though these locations may sound very different from one another there is a common factor: coastline. European, South American, and Asian densities represented on the wind-based power plant graph are clustered around areas of large bodies of water, including the ocean. This does make sense as coastlines would not have any large landmass or buildings obstructing the wind from reaching the power station. In addition to this, wind storms, blowing in from the ocean, provide the plants a sufficient amount of energy generating power. It should be noted that some outliers to this explanation occur in the midwestern United States. On a closer look, though, the midwest tends to be flat, meaning that, just like the coastlines, there are no obstructions.