Page 152 - Science Class 07
P. 152

DEFORESTATION                         sign. The amount of CO  is also increasing due
                                                                                             2
              Deforesta on  is  the  clearing,  destroying  or      to deforesta on and industralisa on. All these
              otherwise removal of trees through deliberate,        things  have  resulted  in  an  overall  climate
              natural or accidental means. It can occur in any      change.
              area  densely  populated  by  trees  and  other       v Soil  Erosion  :  Soil  erosion  is  a  con nuous
              plant  life,  but  the  majority  of  it  is  currently   process and may occur either at a rela vely
              happening in the Amazon rainforest.                       unno ced  rate  or  an  alarming  rate  contri-
                                                                        bu ng  to  copious  loss  of  the  topsoil.  The
                                                                        outcomes  of  soil  erosion  are  reduced  agri-

                                                                        cultural produc vity, ecological collapse, soil
                                                                        degrada on, and the possibility of deser fi-
                                                                        ca on.
                                                                    v Flood : Forests also check floods. The trees
                                                                        of the forest act as natural barrier for the
                                                                        flowing water and hence control floods to
                                Deforesta on
                                                                        a certain extent. In many parts of the world
              The  loss  of  trees  and  other  vegeta on  can          floods occur frequently because there are
              cause  climate  change,  deser fica on,  soil              no forests.
              erosion,  fewer  crops,  flooding,  increased
              greenhouse  gases  in  the  atmosphere  and  a

              host of problems for indigenous people.
              Deforesta on occurs for a number of reasons,
              including  farming,  urbanisa on  (the  main
              responsible  factor)  and  logging  for  materials

              and  development.  It  has  been  happening  for
              thousands of years, arguably since man began
                                                                                          Flood
              conver ng from hunter/gatherer to agricultural
              based  socie es,  and  required  larger,  unob-       v Loss of natural habitat : You already know
              structed tracks of land to accommodate ca le,             that  forests  provide  habitat  for  a  wide
              crops and housing. It was only a er the onset             variety  of  animals.  Due  to  deforesta on
              of the modern era that it became an epidemic.             the animals lose their habitat. In this case,
              Deforesta on  has  a  great  impact  on  the              they  either  move  to  other  places  or  die.

              environment as well as on the living beings.              Many  rare  species  of  plants  and  animals
                                                                        have vanished due to deforesta on.
              Let's study about these impacts:

              Climate Change
              Forest  helps  in  rainfall  and  also  maintain  the
              temperature. Due to deforesta on a large part
              of  the  earth  is  facing  the  problem  of  low
              rainfall. The temperature of the earth’s atmos-
              phere  is  also  increasing  which  is  not  a  good                   Ex nct Animals

              152                                                                                           Science-7
   147   148   149   150   151   152   153   154   155   156   157