There are many ways of generating electrical energy. Research three of the following, describe how they work, and discuss the pros and cons of each of the three chosen kinds of electrical power plants: thermal power plant (aka coal power plant)
nuclear power plant
solar power plant
hydroelectric power plant
geothermal power plant
tidal power plant
wind farms

 Windmills,SolarPanels,And Thermal energy

a. is the answer because they are not shared

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia