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From: madhu_pkReply 1 of 23Reply
Subject: Contributed Answer/Explanation to Q. 1
   
   
   Liquefied petroleum gas..
   
   
    
   
   
   it is a non renewable resource

Posted at: Sun Mar 21 05:42:00 2010 (GMT)

From: madhu_pkReply 2 of 23Reply
Subject: Contributed Answer/Explanation to Q. 2
   
   
   causes of natural land degradation are:
   
   
   1. earthquakes
   
   
   2. floods
   
   
   3. desertification

Posted at: Sun Mar 21 05:42:55 2010 (GMT)

From: madhu_pkReply 3 of 23Reply
Subject: Contributed Answer/Explanation to Q. 3
   
   
   1. it maintains a balance in the temperature of the atmosphere by absorbing
   carbondioxide .
   
   
   2. it maintains the fertility of the soil

Posted at: Sun Mar 21 05:44:36 2010 (GMT)

From: madhu_pkReply 4 of 23Reply
Subject: Contributed Answer/Explanation to Q. 4
   
   
   1. source correction methods
   
   
   2. pollution control equipments

Posted at: Sun Mar 21 05:45:19 2010 (GMT)

From: madhu_pkReply 5 of 23Reply
Subject: Contributed Answer/Explanation to Q. 6
   
   
   1.wave energy
   
   
   2. tidal energy

Posted at: Sun Mar 21 05:46:02 2010 (GMT)

From: madhu_pkReply 6 of 23Reply
Subject: Contributed Answer/Explanation to Q. 7
   
   johads are check dams or embankments built across the contour of the slope
   to harvest rainwater during monsoon season.

Posted at: Sun Mar 21 05:47:08 2010 (GMT)

From: madhu_pkReply 7 of 23Reply
Subject: Contributed Answer/Explanation to Q. 8
   
   coral bleaching refers to the loss of algae from the corals leading to its
   whitening which is an indication of the death of the corals.

Posted at: Sun Mar 21 05:48:09 2010 (GMT)

From: madhu_pkReply 8 of 23Reply
Subject: Contributed Answer/Explanation to Q. 14
   
   endangered species are those threatened species whose number has been
   drastically reduced due to some factors. they are on the verge of extinction
   if such factors continue to prolong.

Posted at: Sun Mar 21 05:50:05 2010 (GMT)

From: madhu_pkReply 9 of 23Reply
Subject: Contributed Answer/Explanation to Q. 15
   
   
   carbondioxide sinks are those resources which absorb carbondioxide from the
   atmosphere. they are:
   
   
   1. plants
   
   
   2. oceans

Posted at: Sun Mar 21 05:51:10 2010 (GMT)

From: sumedhaReply 10 of 23Reply
Subject: Contributed Answer/Explanation to Q. 27
   
   volcanoes

Posted at: Thu Sep 9 19:43:14 2010 (GMT)

From: ezhilmathiReply 11 of 23Reply
Subject: Contributed Answer/Explanation to Q. 1
   
   
   LPG - Liquefied Petroleum Gas.
   
   
   Disadvantage - it is highly inflammable 

Posted at: Wed Dec 1 15:34:41 2010 (GMT)

From: ezhilmathiReply 12 of 23Reply
Subject: Contributed Answer/Explanation to Q. 4
   
   1)Electrostatic Precipitators, 2)wet scrubbers, 3) filters

Posted at: Wed Dec 1 15:38:20 2010 (GMT)

From: ezhilmathiReply 13 of 23Reply
Subject: Contributed Answer/Explanation to Q. 5
   
   1) causes skin allergies and diseases 2) increase in the temperature of the
   earth.

Posted at: Wed Dec 1 15:40:12 2010 (GMT)

From: ezhilmathiReply 14 of 23Reply
Subject: Contributed Answer/Explanation to Q. 6
   
   1) solar energy 2) wind energy

Posted at: Wed Dec 1 15:41:35 2010 (GMT)

From: ezhilmathiReply 15 of 23Reply
Subject: Contributed Answer/Explanation to Q. 10
   
   1)to conserve the forests by joint co-operation of the government and the
   people living in the fringes of the forest 2)to allow the local people use
   the resources of the forest in a sustainable manner

Posted at: Wed Dec 1 15:46:59 2010 (GMT)

From: ezhilmathiReply 16 of 23Reply
Subject: Contributed Answer/Explanation to Q. 13
   
   1) greenhouse effect 2)exhaust from the industries and vehicles

Posted at: Wed Dec 1 15:50:08 2010 (GMT)

From: ezhilmathiReply 17 of 23Reply
Subject: Contributed Answer/Explanation to Q. 14
   
   
   ENDANGERED SPECIES :
   
   
                                         
         These are species which exists in low numbers and are in the
   verge of extinction.   

Posted at: Wed Dec 1 15:52:13 2010 (GMT)

From: ezhilmathiReply 18 of 23Reply
Subject: Contributed Answer/Explanation to Q. 15
   
   CORAL REEFS are called 'carbon dioxide sinks ' because they absorb carbon
   dioxide to make their calcareous skeletons

Posted at: Wed Dec 1 15:54:37 2010 (GMT)

From: ezhilmathiReply 19 of 23Reply
Subject: Contributed Answer/Explanation to Q. 17
   
   1) carbon dioxide (CO2) , chlorofluoro carbons(CFC)

Posted at: Wed Dec 1 15:57:02 2010 (GMT)

From: ezhilmathiReply 20 of 23Reply
Subject: Contributed Answer/Explanation to Q. 27
   
   
   Contamination of air with harmful pollutants is called air pollution. 
   
   
   SOURCES:
   
   
                    1)industries
   
   
                    2)auto-mobiles 
   
   
                    3)burning of fossil fuels
   
   
                    4)volcanoes and forest fires

Posted at: Wed Dec 1 16:03:59 2010 (GMT)

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