World Environment Day centers on chemical taints

Today (June 5) is World Environment Day. Its theme focuses on the complex hazards of chemical pollution -- specifically its effect on the human food chain and the world's ground water supply -- but UN environmentalist Mostafa Tolba sees a larger challenge. The need, says the executive director of the United Nations Environment Program, is for governments, industry, and the public to decide the reasonable price to pay for protecting the environment and to pay it. Continuing to neglect this protection, he adds, could cost humanity the earth.