Apr. 13, 2007 — A group of environmental and labor organizations is challenging the Nano Risk Framework being put together by DuPont and Environmental Defense, calling it a public relations campaign.

In an “open letter to the international nanotechnology community”, the coalition, which includes Greenpeace and the United Steelworkers of America, says, “We strongly object to any process in which broad public participation in government oversight of nanotech policy is usurped by industry and its allies.”