Economic development is necessary if we want to improve s    1    . There comes a time w    2     the old must give way to the new, and it is not possible to p    3     everything from our past as we move towards the future. Finding and keeping the right b     4     between progress and the protection of cultural sites can be a big challenge.

Big challenges, however, can sometimes lead to great s    5    . In the 1950s, the Egyptian government wanted to build a new dam across the Nile in order to control floods, produce electricity, and s     6     water to more farmers in the area. But the p    7     led to protests. Water from the dam would likely damage a number of temples and d    8     cultural relics that were an important part of Egypt’s cultural h    9    . After listening to the scientists who had studied the problem and citizens who lived near the dam, the government t     10     to the United Nations for help in 1959.