Explain thermal insulation and why is it needed? Also, discuss the various types of insulating materials.

Thermal insulation refers to the process of reducing heat transfer between objects in thermal contact or within a given environment. Heat transfer occurs through conduction, convection, and radiation, and thermal insulation helps minimize these processes by using materials with low thermal conductivity. The primary purpose of thermal insulation is to maintain temperature conditions by reducing heat loss or gain, thereby improving energy efficiency and comfort in residential, commercial, and industrial applications.

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