This is known as social infrastructure. These are called social because they are used by all people in a country and are often paid for by the country or the state owns the land on which they are built. When they are private, they often work together with the government.
Two reasons:
1. cold winters
2. rocky soils (not good for growing plants)
He's showing a lack of conservation which means he's unable to understand that the quantity is the same after it underwent a shape transformation.
Anselm argued that an ideal being is important to exist. during this argument God is an excellent being thus he should exist that is understood because of the ontological argument. Guanilo thought this argument was absurd and he viewed the other. one thing doesn't exist simply because it's excellent and he used the instance of an ideal island. The island is ideal thus in step with Anselm's view it ought to exist however the island stop to exist thus Guanilo planned this argument to be reductio ad absurdum. as compared they each agree that as a result, of one thing is ideal it doesn't exist however in distinction saint believed that God was an exception to the present because God is a whole totally different matter and Gaunilo doesn't believe God is an exception to the present view, though he Guanilo believes in God he doesn't consider the ontological argument as proof of Gods existence.
The Iron Curtain was a problem because it blockaded access to East Berlin and prevented the free flow of Germans across the borders between East and West Germany. More broadly it prevented the movement of ideas and peoples across this artificially created boundary. And more importantly than that it signified the dividing line of the Cold War between Western Europe and the United States and the Soviet Union which had a major impact on fomenting mistrust and conflict.