Dams are important because:
They provide water for domestic, industry and irrigation purposes.
Dams often also provide hydroelectric power production and river navigation.
Domestic use includes everyday activities such as water for drinking, cooking, bathing, washing, and lawn and garden watering.
Dams and their reservoirs provide recreation areas for fishing and boating.
They help people by reducing or preventing floods. During times of excess water flow, dams store water in the reservoir; then they release water during times of low flow.
The correct answer is - A. Desertification is increasing, and the desert is expanding.
The Sahara desert has been expanding in the past decades, and it has started to overtake territory south of it. This is mainly due to climate changes, the precipitation has been decreasing, the temperatures have been rising, so the desert has slowly crippled into the territories that were once steppes and savannas. There is an organized action from the people that leave on the borderline of the desert, where they have been thought some techniques as to how to stop the desert growing, and they have gladly accepted it and work hard on it. Initially it seems that there are positive results, but for sure only the time will tell.
I am absolutely sure that <span>the percent of the Sahara Desert is covered by sand sheets and dunes is definitely 25 %. Even though it might seem weird, it is actually correct and here are the pic from artcicle about Sahara which will pose as a proof : )
Do hope it will help!
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Answer:
North American Tectonic plates
Answer:
Rift valley, fault, graben and mid oceanic ridge are the landform formed due to divergent plate boundary.
Explanation:
Plate boundary explains convergent or destructive, divergent or constructive and transform plate boundary across the world between different plates. African rift valley formed in the Africn continent which is major landform due to divergent plate boundary. Faault and graben also formed which means narrower than rift valley. Mid oceanic ridge formed in North Atlantic ocean which is formed between North American plate and Eurasian plate due to divergent plate boundary.
