Irish Times: IT IS quite remarkable how few early warnings about risks to human health or the environment over the years turned out to be unfounded. Whether the dangers came from X-rays, DDT, tobacco smoking, asbestos, lead in petrol or chlorofluorocarbons (CFCs), early warners were proved right, often after decades of denial by vested interests. Similar struggles are still being waged over electromagnetic radiation from powerlines, dioxins from waste incineration or desirability of producing food …