>>24
and US producing more material and other countries is obvious given how big US is. Now if you compare US to whole of Europe, then Europe leads.
"The European Union leads the U.S. in...the number of science and engineering graduates; public research and development (R&D) expenditures; and new capital raised" (The European Dream, p.70).
"Europe surpassed the United States in the mid-1990s as the largest producer of scientific literature" (The European Dream, p.70).