Population density

Population density is the number of people per unit of area usually per square kilometer or mile (which may include or exclude cultivated or potentially productive area). Commonly this may be calculated for a county, city, country, another territory, or the entire world.The world's population is 7 billion, and Earth's total area (including land and water) is 510 million square kilometers (197 million square miles).Cities with high population densities are, by some, considered to be overpopulated, though the extent to which this is the case depends on factors like quality of housing and infrastructure and access to resources.

Lugo population pyramid

Synoptic Chart of the Spanish Political System

Map Of Countries Of The European Union

The EU is a unique economic and political partnership between 27 European countries that together cover much of the continent.The result was the European Economic Community (EEC), created in 1958,and initially increasing economic cooperation between six countries: Belgium, Germany, France, Italy, Luxembourg and the Netherlands.It was created in the aftermath of the Second World War.The EU is based on the rule of law.

This Map is a fully editable, layered Adobe Illustrator file. Adobe Illustrator files are vector format files, allowing for high-quality artwork at any magnification. All major feature class is located on its own layer.

The Synoptic Chart

The water cycle

Earth's water is always in movement, and the natural water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth. Water is always changing states between liquid, vapor, and ice, with these processes happening in the blink of an eye and over millions of years.