THESE SLIDES ARE ABOUT BIOTECHNOLOGY TO FIGHT AIR POLLUTION

1. PRESENTATION

2. PRESENTED BY: Tayyaba Latif

3.  At the University of Freiburg in Germany a
team of biologists is growing moss in a
controlled environment.
 Mosses are especially well suited as bio-
indicators for airborne contaminants as they
have no roots and a very high surface –to-
mass ratio .

4.  Mosses are used to fight air pollution because
by mass they have a huge surface area.
 So because of its huge surface area it can
clean dirt particles out of the air.
 Mosses are non-vascular plants that act as
natural air filters against trace elements
present in air.

5.  To survive they accumulate trace elements
from atmosphere.
 In this way they are able to accumulate and
retain air pollutants.

6.  By using spores scientists grow new plants in
the laboratories.
 These spores of moss help to monitor the
levels of nitrogen and sulfur oxides in the air.
 The moss plants are transferred to air-
permeable bags then moved to monitoring
stations where they absorb pollutants from
the air.

7.  The leafy surface of moss plant is capable of
hoarding huge amount of polluting agents
such as Carbon dioxide and nitrogen oxide.
 Moss plants also generate oxygen and they
cool the surrounding air thus lowering the
amount of pollutants present in the air.

8. Thank you 