দূষিত বাতাসের কোন গ্যাস ওজন স্তরের সবচেয়ে বেশি ক্ষতি করে?

Secondary Teacher Govt Secondary Teacher BCS 15th BCS Preli - 1993 19th BCS Preli - 1998 21st BCS Preli - 1999 Govt Secondary Teacher - 2008 PSC NSI Assistant Director - 2015 Primary Teacher Pre-Primary Teacher - 2015 DPE Primary Head Teacher - 2012 ACC ASI - 2004 ACC Inspector - 2003 MoI Assistant Director - 2001 NTRCA 10th NTRCA - 2014 DOL Assistant Director - 2005 MoFA Personal Officer - 2006 DGFP FWV (Trainee) - 2010 BPSC Assistant Director - 2006 BPSC Assistant Secretary - 2005 DOL Assistant Labour Officer - 2003 DIP Assistant Director - 2003 Standard Bank Standard Officer (Cash) - 2011 15th NTRCA College - 2019 Pre-Primary Teacher - 2013 CS Office Kushtia – Health Assistant - 2025 সাধারণ বিজ্ঞান 2008 ওজোন স্তর ও গ্রিনহাউস প্রভাব (Ozone Layer & Greenhouse Effect)