As the largest artificial ecosystem on Earth, croplands not only secure basic living materials for people but also provide ecological service values human society. For croplands, services have proven to be of great value and are closely linked activities climate change. However, spatiotemporal patterns cropland their drivers still need further assessed quantitatively. In this study, we provided...

cconcerning the emer gence of substantial changes in major cities within the past two decades and its relationship to a set of ideas which envisage the emergence of a new urban era, this article will try to examine the different aspects of the new urban policies as a necessary response to a new national and international economy. cconcerning the emer gence of substantial changes in major cities...