08 September 2020 | 09:51 Asia/Singapore NUS researchers use pineapple leaves in eco-friendly way to preserve food and treat waste water The Straits Times Online, 8 September 2020CNA, 8 September 2020TODAY, 9 September 2020Lianhe Zaobao, 9 September 2020, p8Berita Harian, 9 September 2020, p14