On 27th of March, Gan was invited to give a keynote speech on SEW-REAP closing conference jointly hosted by Lancaster University, South China Agricultural University (SCAU) and GIG. He talked about ” Personal perspective on pollution issues and priorities – air, soils, waters'” in the “Pollution” section chaired by Kevin and Silvia. SEW-REAP project is funded by the EU and aimed to “Addressing food Security, Environmental stress and Water by promoting multidisciplinary Research EU And China Partnerships in science and business”.