Physics
The force that generates wind is

Gravity force
Centrifugal force
Coriolis force
Pressure gradient force

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Physics
Light houses are places with powerful lights to :

Guide and resolve traffic jams in crowded metro-cities during nights
Guide and warn the ships coming from different directions in the ocean
Guide and help large crowds at religious gathering during nights
Indicate to the incoming warships, the location of a harbour during night

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Physics
Thermohaline circulation is mainly due to

Winds causing circulation of ocean water
Cold, dense ocean water sinking and warmer water replacing it
Warmer, less dense water sinking in the ocean and cold water replacing it
Warm water being added to the ocean due to industial waste

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