The Great Plains region of the United States is an agricultural production center for the global market and, as such, an important source of greenhouse gas (GHG) emissions. This article uses historical agricultural census data and ecosystem models to estimate the magnitude of annual GHG fluxes from all agricultural sources (e.g.
View Article and Find Full Text PDFPopul Res Policy Rev
October 2012
Between 1900 and 1990, the percentage of U.S. white women aged 40-69 living with a child of their own fell from 63% to 27%, with three fourths of that change occurring between 1940 and 1960.
View Article and Find Full Text PDFEuropean settlement of North America has involved monumental environmental change. From the late 19th century to the present, agricultural practices in the Great Plains of the United States have dramatically reduced soil organic carbon (C) levels and increased greenhouse gas (GHG) fluxes in this region. This paper details the development of an innovative method to assess these processes.
View Article and Find Full Text PDF