Sustainability 2015, 7, 5371-5397; doi:10.3390/su7055371 OPEN ACCESS sustainability ISSN 2071-1050 www.mdpi.com/journal/sustainability Article Changes in Arable Land Demand for Food in India and China: A Potential Threat to Food Security Reshmita Nath 1,2, Yibo Luan 2, Wangming Yang 2, Chen Yang 2, Wen Chen 1, Qian Li 3 and Xuefeng Cui 2,* 1 Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; E-Mails:
[email protected] (R.N.);
[email protected] (W.C.) 2 State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China; E-Mails:
[email protected] (Y.L.);
[email protected] (W.Y.);
[email protected] (C.Y.) 3 Key Laboratory of Middle Atmosphere and Global Environmental Observations, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; E-Mail:
[email protected] * Author to whom correspondence should be addressed; E-Mail:
[email protected]; Tel./Fax: +86-10-5880-2701. Academic Editor: Marc A. Rosen Received: 3 March 2015 / Accepted: 24 April 2015 / Published: 30 April 2015 Abstract: India and China are two similar developing countries with huge populations, rapid economic growth and limited natural resources, therefore facing the massive pressure of ensuring food security. In this paper, we will discuss the food security situations in these two countries by studying the historical changes of food supply-demand balance with the concept of agricultural land requirements for food (LRF) from 1963–2009.