Planting more and more trees helps to
reduce CO2 in the air
increase CO2 in the air
reduce O2 in the air
reduce CO2 and increase O2 in the air
Ozone depletion in the stratosphere is mainly caused by
SO2
NO2
NO
Chlorofluorocarbons
Persons working in cement plants and lime stone quarries are more prone to disease like
asthama
cancer
silicosis
pneumoconiosis
A person dies in atmospheric of CO because it
combines with oxygen present in the body
destroys W.B.C
reduces water in the tissues.
combines with haemoglobin of blood and form stable compound carboxyhaemoglobin and reduces the oxygen carrier capecity of blood .
Lead in water can cause
arthritis
hair falling
kidney damage
All of these
Ultraviolet radiation is absorbed by
exosphere
ionosphere
mesosphere
stratosphere
Formula of tear gas is
COCl2
N2O
C10H5ClN2
none of these
Ozone in stratosphere is depleted by
C6F6
C6H6Cl6
CF2Cl2
C7F16
Lead population is mainly caused by
sewage
insecticide
leaded gasoline
None of these
Pollutants released from iron and steel industry are
CO2, NO2, H2S
CO, CO2, SO2
CO2, SO2, NO2
CO2, NO, SO2
