WHAT IS GREEN HOUSE
A GREEN HOUSE IS A HOUSE MADE
OF GLASS OR TRANSPARENT MATERIAL,IT IS USED IN COLD COUNTRIES FOR AGRICULTURAL
CULTIVATION.IT ALLOWS SUNLIGHT TO ENTER THE HOUSE AND WARM INSIDE ALSO PREVENT
HEAT LOSS BY REFLECTING THE ENERGY BACK IN TO THE HOUSE AND MAINTAIN
COMFORTABLE WARM ATMOSPHERE INSIDE THE HOUSE
WHAT IS GREEN HOUSE
EFFECT
OUR ATMOSPHERE ALSO ACT
AS A GREEN HOUSE TO KEEP THE EARTH WARM,THE EARTH IS WRAPPED BY A BLANKET OF
AIR CALLED ATMOSPHERE WHICH IS MADE OF SEVERAL LAYERS OF GASES. THE GASES IN
THE ATMOSPHERE ALLOWS SUN LIGHT TO THE EARTH SURFACE,BUT THEY TRAP THE HEAT BY
REFLECTS BACK. THIS IS CALLED GREEN HOUSE EFFECT AND IT KEEPS THE EARTH WARM
ENOUGH TO SUSTAIN LIFE,THE AVERAGE TEMPERATURE MAINTAIN BY THE GREEN HOUSE
EFFECT IS 15°C WITHOUT THE GREEN HOUSE EFFECT IT MAY DROP AS
-18°C. THE GREEN HOUSE EFFECT IS NATURAL WARMING PROCESS OF EARTHS
GREEN HOUSE GASES
WATER VAPOUR,CARBON DI OXIDE,METHANE,NITROUS OXIDE,FLUORINATED GASES AND
OZONE
GLOBAL WARMING
THE GLOBAL WARMING IS CAUSED BY THE EMISSION OF MAN MADE GREEN HOUSE
GASES.WHICH INCREASES THE THICKNESS OF NATURAL GREEN HOUSE GASES LAYER THAT
PREVENTS OUTGOING RADIATION OF THE SUN LIGHT. THIS RESULTS EXCESSIVE HEATING UP
OF EARTH AND CAUSES THE PHENOMENON OF GLOBAL WARMING. HIGHER CONCENTRATION OF
CARBON DI OXIDE AND OTHER GREEN HOUSE GASES TRAP MORE INFRA RED ENERGY IN
ATMOSPHERE THAN WHAT OCCURS NATURALLY
EFFECTS OF GLOBAL WARMING
1.INCREASE IN AVERAGE TEMPERATURE
2.MELTING POLAR ICE AND
RISING SEA LEVEL
3.AGRICULTURE
4.ECOSYSTEM
ACID RAIN
ACID RAIN CAUSED BY THE
BURNING OF FOSSIL FUEL,OIL AND COAL,WHICH RELEASES SULPHOR DI OXIDE AND
NITROGEN OXIDES IN TO THE ATMOSPHERE,THESE GASES RISE TO THE ATMOSPHERE AND MIX
WITH CLOUDS, THE CLOUDS ABSORB THIS AND THIS GASES REACT WITH WATER OXYGEN AND
OTHER CHEMICALS TO FORM VARIOUS ACIDIC COMPOUNDS, THE CLOUD PROVIDES RAIN IT
FALL WITH HIGHER THAN THE NORMAL LEVEL OF ACIDITY (LESS THAN 5.6 PH) THIS IS
CALLED ACID RAIN
EFFECTS
1.IT CAUSES HEALTH
PROBLEMS IN PEOPLE
2.IT HARMS LAKES,RIVER
AND STREAMS BECOME ACIDIC
3.IT DAMAGES SOIL AND
THE TREE ROOTS,WHEN SOIL IS ACIDIC TREE ROOTS ARE DAMAGED
4. IT DAMAGES BUILDING
AND OBJECTS
OZONE
OZONE IS A NATURAL GAS MADE UP OF
THREE OXYGEN ATOMS(o3) THAT IS FOUND IN TWO DIFFERENT LAYERS OF THE
ATMOSPHERE IN THE LAYER AROUND THE EARTH SURFACE ON STRATOSPHERE,OZONE PROTECTS
EARTH FROM THE SUNS ULTRA VIOLET (U.V.) RADIATION
OZONE DEPLETION
DESTRUCTION OF THE
STRATOSPHERIC OZONE LAYER IS CALLED OZONE DEPLETION.THE DESTRUCTION OF OZONE IS
CAUSED BY THE BREAK DOWN OF CERTAIN CHLORINE OR BROMINE CONTAINING COMPOUNDS
(CHLOROFLUOROCARBONS OR HALONS) WHICH BREAKDOWN WHEN THEY REACH THE STRATOSPHERE AND THEY CATALYTICALLY DESTROY OZONE MOLECULES
OZONE IS FORMED IN THE STRATOSPHERE WHEN
OXYGEN MOLECULES PHOTO DISSOCIATE AFTER ABSORBING AN ULTRAVIOLET RAYS. THIS
CONVERTS A SINGLE O2 INTO TWO ATOMIC OXYGEN RADICALS.
THE ATOMIC OXYGEN RADICALS THEN COMBINE WITH SEPARATE O2
MOLECULES TO CREATE TWO O3 MOLECULES.THIS OZONE
MOLECULES ABSORBS U.V.RAYS AND AGAIN SAME PROCESS IS CONTINUING
WHEN C.F.C.REACH THE UPPER ATMOSPHERE THEY ARE EXPOSED TO U.V.RAYS WHICH CAUSES THEM TO BREAKDOWN IN TO SUBSTANCES THAT INCLUDES CHLORINE.THE CHLORINE REACTS WITH OXYGEN ATOM IN OZONE AND RIPS APART THE OZONE MOLECULE.AS PER SCIENTISTS ONE ATOM OF CHLORINE CAN DESTROY MORE THAN 100000.OZONE MOLECULES
OZONE DEPLETING SUBSTANCES (ODS)
THE MAIN OZONE DEPLETING SUBSTANCES ARE
1.CHLOROFLUOROCARBONS (CFCS)
a) USED AS REFRIGERANTS
b)
FOUND IN INDUSTRIAL SOLVENTS, DRY-CLEANING AGENTS
c) ALSO USED IN FOAM PRODUCT
d) USED IN AEROSOL
2. HALONS
a)USED AS FIRE EXTINGUISHING AGENTS
3. METHYL
CHLOROFORM
a)USED AS INDUSTRIAL DE GREASING AGENTS,ADHESIVE AND CHEMICAL PROCESSING
4. CARBON
TETRACHLORIDE
a) USED AS SOLVENTS AND CARBON REMOVER
5. HYDROFLUOROCARBONS
(HCFCS)
a) TRANSITIONAL SUBSTITUTE OF CFC, USED AS REFRIGERANT
6.METHYL BROMIDE
a) AGRICULTURAL FUMIGANT
EFFECTS OF OZONE DEPLETION
1.EFFECT TO HUMAN HEALTH,U.V.EXPOSURE RESULTS SKIN CANCERS,EFFECTS HUMAN IMMUNOLOGY SYSTEM
2.EFFECT IN AGRICULTURE,REDUCED GROWTH OF CROPS
3.EFFECTS TO MARINE LIFE,LOSS OF PLANKTON WILL BE EFFECT MARINE ECOLOGY
4. EFFECTS ON ANIMALS,U.V.EXPOSURE CAUSES EYE AND SKIN CANCER OF ANIMALS
5.WOOD.PLASTIC.RUBBER AND MANY CONSTRUCTION MATERIALS DEGRADED BY U.V.
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