The Bush administration is ordering federal wildlife officials headed for international meetings on polar bears not to talk about how climate change and melting ice are affecting the imperiled animals. It is the latest in a string of cases in which the administration has carefully controlled or even banned government employees' public speech about global warming. This latest chapter involves two memorandums written in late February that put strict limits on what U.S. Fish and Wildlife Service employees could discuss at meetings in Norway and Russia. A third memo says the policy will apply for trips to those two nations as well as Canada and any northern country." The memos came just months after the administration, under pressure from a suit brought by conservationists, announced that it would consider protecting the bears under the Endangered Species Act. Top-down control of government scientists' discussions of climate change became controversial last year, after appointees at NASA kept journalists from interviewing climate scientists and discouraged news releases on global warming. In June, a high-ranking official in [NASA admitted] the agency "inappropriately" denied a journalist's request to interview James Hansen, an outspoken scientist who heads NASA's Goddard Institute for Space Studies. In September, news accounts revealed that the National Oceanic and Atmospheric Administration had suppressed an internal agency e-mail intended to summarize scientists' consensus on evidence of a link between hurricanes and climate change.

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