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ATTACK OF DRIVER ANTS

 In this clip from the BBC’s Natural World:                                                                                                     Ant Attack, we see central and east Africa’s powerful dorylus or driver ants hard at work. Watch as construction and ground workers begin to move up to 80 pounds of soil from the base of a fallen tree. It will become their new home in just a few days. Previous soil residents, beware! Plus, note how their sizes vary greatly, dependant on their role in the colony. A few fascinating facts: Seasonally, when food supplies become short, they leave the hill and form marching columns of up to 50,000,000 ants, which are considered a menace to people, though they can be easily avoided; a column can only ...

Hydroelectric plant

    Another conventional source of energy is the kinetic energy of flowing water or the state energy of water at a height. In a hydro power plant, the potential energy of the falling water is converted into electrical energy. Which can be used as a source of static energy. Since the number of such water-falls is very low, hydro power plants have been associated with dams. Many dams have been built around the world in the last century. A quarter of our energy demand is supplied by hydro power plants.
   High dams are built on the river to collect water in large reservoirs by blocking the flow of water to generate hydroelectricity.  The water level rises and in this process the kinetic energy of the flowing water is carried through the energy to the turbine at the bottom of the dam through pipes.  Every time the reservoir is replenished with water due to rain (hydroelectricity is a recoverable source) Thus, we do not have to worry about the destruction of hydroelectric sources like fossil fuels that are going to be destroyed one day.  But, many difficulties with the construction of large dams
  Is involved.  Dams can be built in certain areas, especially in hilly areas.

  Due to the construction of dams, a lot of arable land and human habitats are destroyed due to submergence, vegetation etc. are submerged in water.  The construction of dams also raises problems of satisfactory rehabilitation and compensation of the displaced.  Opposition to the construction of the Tehri Dam on the Ganges and the construction of the Sardar Sarovar Dam on the Narmada River was due to similar problems.

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