The sources and distribution of anthropogenic nitrogen (N), including N fertilization and N fixed during fossil-fuel combustion, are rapidly becoming globally distributed. Responses of terrestrial ecosystems to anthropogenic N inputs are likely to vary geographically. In the temperate zone, long-term N inputs can lead to increases in plant growth and also can result in over-enrichment with N, eventually leading to increased losses of N via solution leaching and trace-gas emissions, and in some cases, to changes in species composition and to ecosystem decline. However, not all ecosystems respond to N deposition similarly; their response depends on factors such as successional state, ecosystem type, N demand or retention capacity, land-use history, soils, topography, climate, and the rate, timing, and type of N deposition. We point to some of the conditions under which anthropogenic impacts can be significant, some of the factors that control variations in response, and some areas where uncertainty is large due to limited information.

Energy development, interpreted broadly to mean increased provision and use of energy services, is an integral part of enhanced economic development. Advanced industrialized societies use more energy per unit of economic output and far more energy per capita than poorer societies, especially those still in a preindustrial state. Energy use per unit of output does seem to decline over time in the more advanced stages of industrialization, reflecting the adoption of increasingly more efficient technologies for energy production and utilization as well as changes in the composition of economic activity (see, e.g., Nakicenovic 1996). And energy intensity in today's developing countries probably peaks sooner and at a lower level along the development path than was the case during the industrialization of the developed world. But even with trends toward greater energy efficiency and other dampening factors, total energy use and energy use per capita continue to grow in the advanced industrialized countries, and even more rapid growth can be expected in the developing countries as their incomes advance. The fact that expanded provision and use of energy services is strongly associated with economic development leaves open how important energy is as a causal factor in economic development. Development involves a number of other steps besides those associated with energy, notably including the evolution of education and labor markets, financial institutions to support capital investment, modernization of agriculture, and provision of infrastructure for water, sanitation, and communications. This is not just an academic question; energy development competes with other development opportunities in the allocation of scarce capital and in the allocation of scarce opportunities for policy and institutional reform.

A doubling in global food demand projected for the next 50 years poses huge challenges for the sustainability both of food production and of terrestrial and aquatic ecosystems and the services they provide to society. Agriculturalists are the principal managers of global useable lands and will shape, perhaps irreversibly, the surface of the Earth in the coming decades. New incentives and policies for ensuring the sustainability of agriculture and ecosystem services will be crucial if we are to meet the demands of improving yields without compromising environmental integrity or public health.

The overall goal of our paper is to explore this question of how China's policy will likely respond as the nation enters the WTO. Specifically, we will have three objectives. First, we briefly review China's existing agriculture policy and past performance of China's agriculture and how it has changed during the past 20 years of reform. Next, we examine the main features of the agreement that China must adhere to as they enter WTO. Finally, we consider a number of possible ways that policy makers may respond, primarily focusing on the national government's viewpoint.

The overall goal of this section is to understand how WTO will affect the agriculture sector in China. To accomplish this goal we have two specific objectives. First, we seek to provide measures of the distortions in China's agricultural sector at a time immediately prior to the nation's accession to WTO. Second, we seek to assess how well integrated China's markets are in order to understand which areas of the country and which segments of the farming population will likely be isolated from or affected by the changes that WTO will bring. Ultimately, with a knowledge of the size and magnitude of the impacts, researchers will be better able to being working on understanding how the policies that WTO will impose on China will change the gap between the domestic and international price and affect imports and exports, domestic production and production, income and poverty.

China and the World Trade Organization

On balance, will the nation's accession to WTO help or hurt rural residents? How will they affect rural incomes? Who in the rural economy will get hurt? Are there some in the rural economy who will be insulated from the effects of WTO?

The general goal of our essay will be to begin the discussion of these critical questions. In particular, we will attempt to meet this broad goal by pursuing three sets of objectives. First, we will examine the record of rural incomes, in general, and then focus on how employment may be affected by China's accession to WTO.

Second, we will attempt to understand how WTO will affect the agriculture sector, in particular. To do so, we will provide measures of the distortions in China's agricultural sector at a time immediately prior to the nation's accession to WTO and seek to assess how well integrated China's markets are in order to understand which areas of the country and which segments of the farming population will likely be isolated from or affected by the changes that WTO will bring. Ultimately, with a knowledge of the size and magnitude of the impacts, researchers will be better able to begin working on understanding how the policies that WTO will impose on China will change the gap between the domestic and international price and affect imports and exports, domestic production and production, prices, income and poverty.

Third, we will examine the policy options that the government has available to them in the wake of WTO.

A survey of China's plant biotechnologies shows that China is developing the largest plant biotechnology capacity outside of North America. The list of genetically modified plant technologies in trials, including rice, wheat, potatoes, and peanuts, is impressive and differs from those being worked on in other countries. Poor farmers in China are cultivating more area of genetically modified plants than are small farmers in any other developing country. A survey of agricultural producers in China demonstrates that Bacillus thuringiensis cotton adoption increases production efficiency and improves farmer health.

Despite the strong signal of El Nino/Southern Oscillation (ENSO) events on climate in the Indo-Pacific region, models linking ENSO-based climate variability to seasonal rice production and food security in the region have not been well developed or widely used in a policy context. This study successfully measures the connections among sea surface temperature anamolies (SSTAs), rainfall, and rice production in Indonesia during the past three decades. Regression results show particularly strong connections on Java, where 55% of the country's rice is grown. Two-thirds of the interannual variance in rice plantings and 40% of the interannual variance in rice production during the main (wet) season on Java are explained by year-to-year fluctuations in SSTAs measured 4 and 8 months in advance, respectively. These effects are cumulative; during strong El Nino years, production shortfalls in the wet season are not made up later in the crop year. The analysis demonstrates that quantitative predictions of ENSO's effects on rice harvests can provide an additional tool for managing food security in one of the world's most populous and important rice-producing countries.