Ozone hole: a longer recovery.(National Aeronautics and Space Administration reports) Environment | September 1, 2006 | COPYRIGHT 2006 Heldref Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information) Copyright

The ozone hole over the South Pole is taking longer to recover than previously thought, according to a recent study by the National Aeronautics and Space Administration (NASA) and two other federal agencies. The study, carried out using a new computer modeling system, projects that the protective ozone layer high over Antarctica (in the stratosphere) will take nearly 20 years longer to fully mend than scientists had estimated. Earlier projections indicated that the ozone layer would recover by 2050; the new findings put recovery in 2068.

Ozone depletion occurs ...

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