to Mr. Mahmoud Ahmed Mohamed (Tel. +201153338232), at the Air Pollution Research Department (room no.13), National Research Centre, Giza, Egypt: 1000 EGP. For students: 500 EGP. Online attendance: 500 EGP. Non-Egyptians: 500 dollars Orange cash to Dr. Salwa Kamal Hassan (mobile: +201221037935): (1000 EGP, + 10 EGP money transfer commission).