**Preface to "Soil Carbon, Nitrogen Sequestration and Greenhouse Gas Mitigation under Global Change"**

Global-change-induced extreme climate events are becoming more common than ever. Soil carbon and nitrogen pools correlate significantly with the changes in atmospheric greenhouse gas levels. A large increase in atmospheric greenhouse gases, namely carbon dioxide, nitrous oxide, and methane, can accelerate atmospheric heating, which is generally followed by global warming. The mitigation of greenhouse gas emissions via various strategies, such as the sequestration of carbon and nitrogen in soil, plant, or ecosystems; the efficient management of agricultural and forestry ecosystems; the mitigation of ecosystem carbon and nitrogen leaching; the mitigation of greenhouse gas emissions from all kinds of sources; etc. will therefore be crucial in the mitigation of global climate change.

By gathering the latest case studies and methodologies, including but not limited to the measurement and mitigation strategies of carbon and nitrogen pools, and greenhouse gas emissions, this reprint will substantially improve our understanding of the potential, ability, and capacity of ecosystems in mitigating greenhouse gas emissions and, hence, global climate change.

This reprint can be used by colleagues working on global climate change, ecology, agriculture, forestry, and policy making associated with global change. The articles included in this reprint were contributed by colleagues from China, Egypt, Italy, Jordan, Mexico, Pakistan, Saudi Arabia, Turkey, and more. I appreciate their substantial contributions to this reprint and the cooperation of my colleagues at Jiangxi Agricultural University.

> **Ling Zhang** *Editor*
