Sustainability Matters is a compilation of some of the best research papers by students from the National University of Singapore's multi-disciplinary and inter-disciplinary graduate programme in environmental studies, the M.Sc. in Environmental Management [MEM]. This collection is for the period 2012/2013 and 2013/2014. Entitled Sustainability Matters: Environmental and Climate Changes in the Asia-Pacific, this is the fifth compilation by the programme, and comprises 18 of the best research papers completed during this period. The papers have been edited for brevity. They analyse the many challenges to effective environmental management covering countries including Bangladesh, Hong Kong, India, Malaysia, Philippines, Singapore and the US. Issues examined include biodiversity conservation, environmental impact assessments, energy, food security, sustainable business practices, public housing, environmental education, and climate change. The first compilation, Sustainability Matters: Environmental Management in Asia was published in 2010 (World Scientific) and comprised the best papers from 2001/2002 to 2006/2007. The second, Sustainability Matters: Challenges and Opportunities in Environmental Management in Asia was published in 2011 (Pearson), and comprised the best papers from 2007/2008 and 2008/2009. The third and fourth compilations (World Scientific) comprised the best papers from the period 2009/2010 to 2011/2012. The papers are edited by five staff members from different disciplines in the MEM programme: Lye Lin-Heng, Victor R Savage, Kua Harn-Wei, Chou Loke-Ming and Tan Puay-Yok.