Centre Number Surname Other Names Candidate Signature Candidate Number For Examiner’s Use Examiner’s Initials Question Mark General Certificate of Education Advanced…
CHAPTER 1 INTRODUCTION Air-Conditioning refers to the process of altering the state of the ambient air in a system to bring it to a desired value. This may be achieved by…
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1. Toxic Pollutants- Dioxins Presented By Abu Khairul Bashar Roll No: 584 Session: 2011-2012 2. Introduction Pollution is the introduction of contaminants into the natural…