The U.S. has more than 87,000 dams greater than six feet high (and two million overall). While many dams continue to provide benefits such as flood control, irrigation, and water supply, for other dams the cost of maintenance or the negative effects on communities, fish, and tribes justifies their removal.
Dam owners and regulators decide whether to remove a dam by weighing many factors including: the cost of removal and the ability to replace any lost power generation against avoided long-term maintenance; safety concerns; benefits to endangered fish populations; increased recreational and commercial fishing; and restoration of cultural values of nearby tribes.
By 2020, roughly 70% of dams will be more than 50 years old, inviting us to reconsider the value to the public of long-term investments in this infrastructure.
<span>C. deforestation caused soil exhaustion and erosion.</span>
Answer:
In this passage refers to the cultural influence of African culture from other continents. However, it wants to adapt to the changes of the modern world. Traditions in Africa are different from those found in other countries. Many events are celebrated through dance, as African art captures through unique ways of transmitting, communicating African cultural values.
Korea acted as a cultural bridge between China and Japan.
