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If the water is on a hilltop, energy must have been used to pump it up there from wherever it originates. On the other hand, when used it will flow downhill without pumping.

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Why are most wind farms built near the top of the hill?

Wind farms are often built on hilltops because wind speeds tend to be higher at higher elevations. This allows wind turbines to generate more electricity efficiently. Additionally, placing wind farms on hilltops helps to maximize the exposure of the turbines to prevailing winds.


How do water towers hold up the weight?

Most water towers are built with two purposes in mind. One is to provide a storage facility for potable water, the other is to provide water pressure for the system. As such, the towers are typically always 'releasing' water. There are normally a couple of one way valves to insure there is no 'backwash' to contaminate the water in the tower, but the tank is providing pressure in much the same way as the tank of a toilet.


What raised access road built across water?

A causeway is a raised road or track across low or wet ground, usually across a body of water. It is often used to create a passage where a bridge would be impractical due to the water's depth or other factors.


What exactly is a Dyson cylinder?

A Dyson cylinder is a theoretical megastructure proposed by physicist Freeman Dyson in the 1960s. It consists of a structure built around a star to harness its energy. The cylinder would enclose the star completely, capturing all of its energy output for use by a civilization.


What type of barrier is built to contain the flow of water?

A dam is typically built to contain the flow of water. Dams are structures built across rivers or waterways to control and regulate the water flow, store water for various purposes, and generate hydroelectric power.