A: Remote Sensing is the technique of collecting information by observing the surface of the Earth and other planetary bodies through sensors on aircraft and space satellites. The basic tool used here is photography-infrared and false colour photography in particular. Modern remote sensing satellites are equipped with special cameras which take photographs of any particular region of the Earth's surface in several colours simultaneously. These separate images can be electronically proceessed to produce multicolour images and maps outlining areas of specific interest such as diseased or pest-infected crops, forest areas and vegetation, rich fishing areas in seas, even underground water and mineral reserves. Remote Sensing is an indispensable tool for better monitoring and management of natural resources.
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