#polluted_points_f {
   marker-fill-opacity: 0.9;
   marker-line-color: #FFFFFF;
   marker-line-width: 0.2;
   marker-line-opacity: 0.7;
   marker-placement: point;
   marker-type: ellipse;
   marker-width: 7;
   marker-allow-overlap: false;
   
   [nag_id=10] {
      marker-fill: #9801d6;
      marker-width: 9;
      [zoom>=12] { marker-width: 6; }
      [zoom>=13] { marker-width: 8; }
      [zoom>=14] { marker-width: 10; }
      [zoom>=16] { marker-width: 12; }
      [zoom>=18] { marker-width: 14; }
   }

   [nag_id=7] {
      marker-fill: #f7b699;
      marker-width: 6;
      [zoom>=12] { marker-width: 4; }
      [zoom>=13] { marker-width: 5; }
      [zoom>=14] { marker-width: 6; }
      [zoom>=16] { marker-width: 8; }
      [zoom>=18] { marker-width: 10; }
   }
   
   [nag_id=8] {
      marker-fill: #a50008;
      marker-width: 9;
      [zoom>=12] { marker-width: 6; }
      [zoom>=13] { marker-width: 8; }
      [zoom>=14] { marker-width: 10; }
      [zoom>=16] { marker-width: 12; }
      [zoom>=18] { marker-width: 14; }
   }
   
   [nag_id=9] {
      marker-fill: #e171fb;
      marker-width: 6;
      [zoom>=12] { marker-width: 4; }
      [zoom>=13] { marker-width: 5; }
      [zoom>=14] { marker-width: 6; }
      [zoom>=16] { marker-width: 8; }
      [zoom>=18] { marker-width: 10; }
   }
}



