NCPA - National Center for Policy Analysis

Global Warming Cooked Books

December 16, 1999

Seven environmental groups have released a worldwide map packed with more than 100 anecdotes and reports of scientific studies that purport to prove catastrophic global warming. But they have cooked the books, says Detroit News reporter David Mastio, by ignoring evidence that doesn't fit.

Today's United Nations estimates of global warming are about half the warming over twice the time -- an average of 4 degrees over the next century -- as estimates made in the 1980s. But despite more careful estimates, some environmental groups insist on confounding other factors with global warming.

For example, in the map compiled by the National Resources Defense Council and other groups:

  • A study is cited that found 31 percent of 65 bird species in England in 1995 laid their eggs an average of 8.8 days earlier than in 1971 -- though the average change for all 65 species was an insignificant 2 days.
  • In the West Antarctic, they report that "Nearly 1,150 square miles shelves collapsed between March 1998 and March 1999," although a recent study in Science found the sheet has retreated several hundred feet a year for more than 7,000 years.
  • A U.N. report suggests global warming may cause tropical diseases to spread to temperate climes, but such "tropical" diseases as Dengue fever, yellow fever and malaria were common until recently in the U.S. and Europe -- with the Netherlands, for instance, only declared malaria-free by the World Health Organization in the 1970s.

They also say global warming may make the weather more unpredictable and extreme, but the period between 1991 and 1994 was the "quietest" on record for hurricane activity.

Source: David Mastio (Detroit News), "Global Warming Propaganda Trumps Science," USA Today, December 16, 1999.


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