Environmentalists sued the Bush administration Tuesday for failing to produce a report on global warming's impact on the country's environment, economy and public health. The lawsuit seeks to compel the U.S. Climate Change Science Program to issue the national assessment, which should contain the most recent scientific data on global warming and projections for its future impacts. The plaintiffs claim the government must complete such a report every four years under the Global Change Research Act of 1990. "Global warming is one of the most serious threats facing humanity today," according to the complaint. Without the report, decision makers and...