Question

usage of electricity in future

Answer 1

The inside of EVs. An electricvehicle uses a battery pack to store electric energy, which in turn powers a motor. ... According to the U.S. Department of Energy's Alternative Fuels Data Center, fully charged EVs have, at present, a shorter range "per charge" than conventional vehicles with a tank of gas.
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Answer 2

hey here is to answer

use iron boxes with automatic temperature cut off.

use CFl bulbs etc...

discharge connection when they not in use

I hope it will help you