Answer:
Explanation: Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat, or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.
The Sahara Desert blankets nearly all of Mauritania, Western Sahara, Algeria, Libya<span>, </span>Egypt<span> and </span>Niger<span>; the southern half of </span>Tunisia<span>; and the northern parts of </span>Mali<span>, Chad and Sudan.</span>
Answer:
Benefits of Dams
Economic benefits of dams are:
1. Electrical Generation.
2. Navigation.
Environmental benefits of dams are:
1. Reduces the consumption of fossil fuels and the green houses gases.
2. It provides water for irrigation.
3. It can prevent uncontrolled flooding.
4. Debris control
Social benefits of dams are:
1. creates recreational activities like boating and fishing.
Explanation:
The landforms on the east and western part of the continent are very different, with the main reason being that the western part is geologically very active, while the eastern lacks geological activity.
Explanation:
The eastern part of the United States and Canada, or rather the eastern part of the North American continent, is a region that lacks geological activity for millions of years. This region can roughly be divided into two parts, one being dominated by the Appalachian Mountain Range, and the other being the plains. The Appalachians are medium high mountains, being heavily eroded, with smaller slopes, and covered with dense forests. The plains stretch along the coastline, but they are also very wide, and move several hundred of km into the mainland, making big portion of this region flat lowlands.
The western part, on the other hand, is geologically very active. There are several young mountain ranges which are still growing. There is volcanic activity, faults, and plateaus between the mountains. The coastal plains are very small and narrow. Because of the shadow effect, between the mountains there are arid zones where deserts and steppes dominate.
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