At the beginning of the 19th century, most Americans had no idea what lay beyond The Mississippi River.
The Aswan High Dam was built to regulate and control the annual flooding of the Nile River in order to protect crops and property from such uncontrolled flooding and to generate electricity. Most of its effects have been positive but several environmental effects are:
- Water-logging: because of the continuous high levels of water, the soil around the area is saturated with water, which prevents oxygenation of the soil that is essential to several plants and crops.
- Salinization of soils: caused by the inability of water-saturated soils to absorb salt, it is toxic to crops and damaging to infrastructures.
- Soil Erosion: it is a consequence of soil salinization as crops die and are unable to hold the soil in place.
There were also other negative effects such as:
- Archeology: two important archeological sites of Ancient Egypt were flooded and covered by the dam waters: the ancient cemetery of Fadrus and the Buhen fort.
- Loss of sediment: the annual flooding carried an enormous amount of sediment that is now trapped within the resulting Lake Nasser. Many of these sediments were used by local industries to manufacture bricks and they lost access to this renewable source of raw materials.
- More expensive and difficult purification of water: because the water does not move as much it is more transparent and allows the sunlight to penetrate deeper. This, combined with the trapped sediments has increased the growth of algae that have proliferated to the point that water purification is more and more expensive due to the necessary removal of this plant.
Answer: Oklahoma’s mineral resource were deposited by an ancient ocean.
Answer: A. A photograph of the West African sculpture.
Explanation: I did the test, and this would seem most plausible, because the West African tribe is not very important, a map is not important at all, and they never talked about comparing and contrasting.
Ahmad Shukeiri was the first Chairman of the PLO Executive Committee from 1964 to 1967. In 1967, he was replaced by Yahia Hammuda. Yasser Arafat occupied the function from 1969 until his death in 2004. He was succeeded by Mahmoud Abbas (also known as Abu Mazen).
