On May 13, William Arko had his PhD confirmation defense in GIG. The assessment panel included Profs Lee Sun-chueng of HKPolyU, Zou Sichun of SYSU, Qi Shihua of CUG (Wuhan), Shizhen, Jun Li and Gan Zhong of GIG. William will be working on POPs in the air of Ghana with specific concern on the influence from e-waste recycling activities in Accra and Kumasi. Hope he good luck with his PhD study!