The present study was carried out to determine the impacts of SO 2 , NO x , SPM and RSPM, the most common air pollutants, generated mainly due to industries and vehicles, on some biochemical parameters and yield in wheat and mustard plants during 2006. The concentration of SO 2 , NO x , SPM and RSPM was determined at the polluted sites across the seasons, which ranged between 14. 29-18.10, 20.81-22.43, 483.65-500.85 and 160.67-171.18 lg m -3 , respectively. The wheat and mustard plants grown at polluted sites showed significant reduction in chlorophyll 'a', chlorophyll 'b', total chlorophyll, carotenoid, ascorbic acid, pH, relative water content and yield. The data were further analyzed using a two way ANOVA. It is concluded that the ambient air pollutants have a potential adverse impact on biochemical parameters, which further leads to a reduction in the yield of wheat and mustard crops.

A  significant  reduction  in  chlorophyll  ‘a’,  ‘b’  and  carotenoid  of   all   the   selected  trees   were  observed   in polluted  site  as   compared  to   their  control   site.  There   was  maximum   (30.99%)  reduction   in   chlorophyll   ‘a’ on the leaves of Psidium guajava L. and minimum  (6.52%)  on  Eucalyptus  citriodora  Hook.  while  maximum chlorophyll ‘b’ contents (43.43%) was depleted in  Syzygiun  cumini  L.  and  minimum  (11.11%)  in  Eucalyptus citriodora Hook..

Noise level was studied in four different categories of area in Haridwar  and  Dehradun  city  viz.  residential, commercial,  silent  and  industrial  zones.   Study   was  carried   out  at  32  locations  with   sound   level   meter   to asses day and night  time  noise  levels  of  Haridwar  and  Dehradun.  However,  noise  level  in  all  the  areas  were found  to  be  above  the  ambient  noise  standards   level.   In   residential   areas  of   Haridwar  and  Dehradun   the noise ranged between 77. 40±4. 52 to   89.90±8.87   dB   (A)   and 70. 70±8. 55   to   92.30±10. 41   dB   (A),   respectively, while  in  commercial   areas  of  Haridwar  and  Dehradun   the  noise   ranged  between   80.20±10.61  to   96.60±10.23 dB (A) and 80.90±6.63 to 89.10±9.81 dB  (A), respectively.

Instead  of having  plenty  of water  in  the Garhwal  Himalayas  in the  form  of Glaciers  and  snow  fed rivers,  a large  population   is  facing  the problem  of easy  availability  of freshwater.  Natural  springs This  paper  deals  with the study of natural  water springs  in  Garhwal  region.  The parameters  studied were alkalinity,  acidity,  DO,  BOD,  free CO,,  nitrate,  H,S,  chlorides,  hardness,  inorganic  phosphates, temperature,  pH and coliform  number.  The study elucidates  that the water quality  of selected  natural water springs  is suitable  for drinking  purpose.

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