Page 4 - OUR ENVIRONMENT AND POLLUTION

3. Some insects and worms live
3. S ome ins ect s and w or ms liv e
he
t

o
oil and help t
s
under
under the soil and help to
decompose plant and animal
decompos e plant and animal
w
.
t
T
es
his
as
he
t
keeps
wastes. This keeps the
env ir onment clean.
environment clean.
4. Nitrogen is an important
4. N it r ogen is an impor t ant
r
ient
all t
he liv
ing
f
or

nutrient for all the living
nut
,
ms
organisms. However, it cannot
ow
ev
or
er
cannot

.
ganis
it
H
be used directly from air. Some
ly
ect
be
us
ome
. S
air
f
ed dir
om
r
bact er ia liv ing in t he s oil
bacteria living in the soil
convert the nitrogen present in
conv er t t he nit r ogen pr es ent in
the air into usable forms that
t he air int o us able f or ms t hat
can be absorbed by plants. This
can be abs or bed by plant s . T his
nit r ogen is pas s ed ont o animals
nitrogen is passed onto animals
w hen t hey cons ume plant s .
when they consume plants.
5. Water, sunlight and air are the
5. Wat er , s unlight and air ar e t he

s
ee impor
hr
element
our
t

t
of
ant
three important elements of our
ial f
e.
he
lif
t
life. They are essential for the
or
s
e
es
hey
ent
ar
T
survival of living organisms.
ing or
of
liv
.
iv
v
ganis
ur
s
ms
al