In many countries people throw away lot of food from restaurant and shop. Why do you think people waste food in this way? What can be done to reduce waste?

The illustration shows the process of the production of electric energy with the use of

water

current which passes through the

power

generator for home use. The process is fundamentally the course of

water

from one

reservoir

to another, which produces electricity along the way and eventually sending to the national grid.

Initially

, the

water

from the river enters the primary

reservoir

, the dam. In the daytime, the dam is opened and the stored

water

flows into the narrower waterway with speed.

Then

,

this

speed produces energy to run the turbines which are connected to the generators in the

power

station. The electric current produced moves

along

Add the preposition

withalong

show examples

the

power

cables of the national grid.

Thereafter

, the residue

water

leaves the turbines and is collected in the secondary

reservoir

; after which,

this

water

stays there till the nighttime.

Subsequently

, when the nighttime falls, the accumulated

water

for the whole daytime is pumped up to the dam to recycle. Unlike the daytime, the

water

flows backwards but no electricity is produced as the

water

flows slower. After all, the turbines are reversible to pump

water

up to the higher part of the

power

station. Later on, the intake is closed so as to prevent

water

from flowing back to the lower

reservoir

. Eventually, the operation of generating

water

is completed and the whole process starts over again.