bet365 best casino games U.S. "Environmental Research Express" recently published a paper "1970-2010 city land expansion by Bulak Güneralp and others, a assistant professor at the Department of Geography of the United States,、Dental and Land Use Transformation: A Trends in Urban Land Expansion, Density, And Land Transitions from 1970 to 2010: A Global Synthesis)。

In this paper，Researchers inspect the changes in bet365 Play online games global urban land and urban population density from the first 10 years of the 1970s to the first 10th century.。They found，Compared to the big city，Small and medium -sized cities with a population of less than 2 million are more obvious in both aspects of the scale of land occupation and decreased urban population density。

According to researchers statistics，Land occupied by expansion of global cities，60%are agricultural land。As a result, many small farmers lose their fertile land，Life suffers a huge impact。This situation will be in India in the future、Nigeria and other bet365 Play online games countries is particularly serious。As a country with the most agricultural population in the world，The situation in India is also the most worrying。1970，The use rate of land in Indian cities has decreased sharply。In the occupied agricultural land，85%is caused by the decrease in urban population density。

other，Urban expansion requires local governments to provide water to farmers who lose the land、Traffic、Housing and other infrastructure，Added the pressure of the local government。Researchers said，1970-2010 The United States is the country with the lowest population Bet365 app download density in the world，Now Southeast Asia、Africa、Small and medium -sized cities in Europe are following the United States。From the perspective of the world，The fastest expansion speed is small and medium cities。Whether in the United States or other places，Very low urban population density usually means the inefficient use of resources。Costing in Laru believes，Urban population density reaches the appropriate level, it is important，Can improve urban residence conditions，can also make resources including land effectively use。

　　(Wang Youran/Compilation)