This chapter advances the UN SDG goals 13, 14, and 15 by examining mathematical computer models of biogeochemical processes of atmosphere, land, and oceans can be represente, used to describe the past, present, and future dynamics of the Earth's carbon cycle

Land use and land cover changes in the Jedeb and Chemoga watersheds have been detected in the past 29 years. 

Provides some details about the hydrologic cycle and then discusses the physical geology of groundwaters.

Water is the fundamental natural resource that supports life, ecosystems and human society. Thus studying the water cycle is important for sustainable development. In the context of global climate change, a better understanding of the water cycle is needed. This study summarises current research and highlights future directions of water science from four perspectives: (i) the water cycle; (ii) hydrologic processes; (iii) coupled natural-social water systems; and (iv) integrated watershed management.

The European Union (EU) has had laws on the disposal of waste for over 30 years and laws concerning the environmental performance of products for over 20. However, these laws have not formed a cohesive whole - and that is about to change. December 2015 saw the European Commission (the body responsible for proposing new EU legislation) published its Circular Economy Package, with the stated objective of "closing the loop" of product lifecycles. This paper provides an overview of this package and demonstrates why the development of standards underpins future legislation.