THEIR STORAGE BATTERIES.
Compared with our world, the fuel of Ploid is very scarce, but less is required to supply the industries. Nearly all power is obtained from the winds, running water and the sun's energy.
The winds are harnessed so that they blow not in vain. Almost every home of ordinary intelligence owns one of the many kinds of storage batteries used in this world. These batteries are usually located beneath the lowest floor of the house, and they constitute the reservoir whence is obtained the necessary power for lighting, heating and cooling the apartments of the home.
People who live along streams of water utilize these streams for similar purposes. It is now conceded in Ploid that the storage batteries of the home can be supplied as economically and effectively by winds and the sun's heat as by running streams; hence it is a common sight to see residences throwing out the old water machinery and introducing the latest design of wind-employers or sun-harnessers.
There are certain emergencies when the storage batteries fail to work or when the power is exhausted; this happens when there is a very slight wind for several days or a heavy drain of power. In such cases fuel is used for heating and lighting.