Global open access slowly growing, study finds - SciDev.Net

"One in five scientific papers is now available freely on the internet, the first global study of research papers across all disciplines has found. Researchers looked at global data for research papers published in 2008: almost nine per cent were freely available on publishers' sites ('gold' access) and another 12 per cent on authors' or departmental websites ('green' access). Chemistry papers were least likely to be freely available, with only 13 per cent open access, while Earth Sciences papers were the most likely to be free — with one in three open access...."