Cover Letter1

Plasma-Catalyst Chemical Process Laboratory Clean Technology Research Center Korea Institute of Science and Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea ----------------------------------------October 15, 2006 Prof. J.H. Tay Editor of J. Hazardous Materials Division of Environ. & Water Resources Singapore Dear Sir and Editor,

Thank you for your consideration and attention to our manuscript. Here, please find the revised manuscript of "Gliding Arc Plasma Processing of CO2 Conversion" by Antonius Indarto, JaeWook Choi, Hwaung Lee, and Hyung Keun Song. In this revised manuscript, I gave yellow marks on every sentence which is different from the previous version. Together with revised manuscript, there are two other files of our response of reviewer questions. If you have problem with it, please send email to me. Finally, for your consideration, thank you very much.

Sincerely,

Antonius Indarto Address: Plasma-Catalyst Chemical Process Laboratory, Clean Technology Research Center, Korea Institute of Science & Technology,

P.O. Box 131, Cheongryang, Seoul 130-650, Korea