Natural borders tend to change due to climate and other causes. Natural borders that are formed around mainly rivers and lakes, to some extent ocean have the largest effects on people. An example of river one is the Natural border of the Rio granda river that borders the states of Texas and Mexico. The change in the Rio granda river caused texas to lose 367 acres of land to Mexico and caused commotion among the US citizens now living in Mexico due to the change of the River. Another example is the flooding of holand in the Netherlands in the past. Due to rising sea levels areas of Holand netherlands are being flooded which effects people and places