Challenge I: Global Food Security The first and continuing challenge facing world agriculture is to produce enough food to feed the growing world population. World population could reach eight billion people by 2025. Nearly all of the increase of two billion people in the next 25 years will be in developing countries. The urban population in developing countries will rise by a like number. The ...

Interim Reports on work of the International Institute for Applied Systems Analysis receive only limited review. Views or opinions expressed herein do not necessarily represent those of the Institute, its National Member Organizations, or other organizations supporting the work. Contents 1 Introduction 1 2 The basic model and its assumptions 3 2.1 Scenario-analysis within a structural economics...

Land use and land cover change is a major issue in global environment change, and is especially significant in rapidly developing regions in the world. With its economic development, population growth, and urbanization, Guangzhou, a major metropolitan in South China, have experienced a dramatic land use and land cover (LULC) change over the past 30 years. Fast LULC change have resulted in degra...

In this paper, the process of urbanization in the current one-sided pursuit of quantity and speed of urbanization, ignoring the inherent quality of urbanization, from the perspective of the development of intensive urbanization, proposed intensive urbanization ideas: From the agglomeration of population, space intensive, industrial clusters defined in terms of the connotation of intensive urban...

How did Europe overtake China? We construct a simple Malthusian model with two sectors, and use it to explain how European per capita incomes and urbanization rates could surge ahead of Chinese ones. That living standards could exceed subsistence levels at all in a Malthusian setting should be surprising. Rising fertility and falling mortality ought to have reversed any gains. We show that prod...

Over the past four decades Delhi, India, has witnessed rapid urbanization and change in land use land cover (LULC) pattern, with most of the cultivable areas and wasteland being converted into built-up areas. Presently around 40% land is under built-up area, a drastic rise of 30% from 1977. The effect of changing LULC, at a local scale, on various variables-land surface temperature (LST), norma...

CONTEXT Ethiopia has been characterized by high population growth. Recent social and economic developments have the potential to alter reproductive patterns in the country. Some of these developments include sustained economic growth, urbanization, rapid growth in school enrollments, expansion of primary health care, and a rise in contraceptive access and use. In other national contexts, these ...

background: a dramatic increase in healthcare expenditures is a major health policy concern worldwide. understanding factors that underlie the growth in healthcare expenditures is essential to assist decision-makers in finding best policies to manage healthcare costs. we aimed to examine the determinants of healthcare spending in iran over the periods of 1978-2011. methods: a time series analys...