These are not fact sheets so much as a brief on all USGS environmentally related projects, past,present and ongoing. The title for the web site is The Science Source for Food, Agricultural and Environmental Issues. CAST is a nonprofit organization composed of scientists from the academic and research communities. The reports vary in length from news brief to lengthy reports. The material reflects the membership, it is high quality, value-added links wherever applicable.
Agricultural material is well represented.
Good links to other environmental sites, especially government related. The NAP publishes reports and books from the National Academy of Sciences, the National Academy of Engineering, the Institute of Medicine and the National Research Council. Hundreds and hundreds of well researched publications are available full-text. There is a section devoted to environmental titles. Issues From the Ecological Society of America.