A national movement aimed at changing the perception that sustainability practices are a business cost was launched on 21 May. The move is aimed at encouraging small and medium-sized enterprises (SMEs) to implement environmentally friendly measures. As of Thursday, 22 large corporates have registered for the Green 100, including Bank of China, Carousell, Keppel, Mandai, Maybank, OCBC, Resorts World Sentosa, SMRT, and SP.