Question

Nints taken
by the
from the plants
Oxygen is inportant
things to survive. It is also neceway
Other cases (carbon
dioxide argon, helium,
neon, water vapour)
1%
(0,03% is carbon
dioxide)
Carbon dioxide is needed by a
for preparing food by the process
Iphotosynthesis,
Argon is used in electric bulbs
Helium is filled in gas ballons
Neon is filled in glow signs​

Answer 1

air

composition of atmosphere

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