While aloft, the shuttle astronauts deployed and retrieved a German-built satellite that scanned the Earth's atmosphere for ozone damage, tested a new mechanical arm developed by the Japanese for use aboard the new U . S .-led international space station, observed the dimming Hale-Bopp comet and conducted biotechnology experiments.
22.
"But I'm skeptical that the small amount of ozone damage produced by inhalers makes a lot of difference in the long run, " said Dr . Betty Wray, president of the American College of Allergy, Asthma and Immunology and chief of the section of allergy and immunology at the Medical College of Georgia, in Augusta.
23.
Molina, who shared a 1995 Nobel Prize with two other scientists for identifying the risk from CFCs 29 years ago, said the progress on curbing ozone damage " is a very good example of human society creating a global environmental problem, but then addressing itply in the 1980s after scientists found substitute compounds that were less harmful _ and particularly after a gaping seasonal hole in the ozone layer was discovered over Antarctica.
24.
Disturbance is often limited to wildfires, but in principle could include any of : forest / land management decisions, windthrow, insect damage, ozone damage etc . DGVMs usually " spin up " their simulations from bare ground to " equilibrium " vegetation to establish realistic initial values for their various " pools " : carbon and nitrogen in live and dead vegetation, soil organic matter, etc . corresponding to a documented historical vegetation cover.
25.
The forest cover seems pretty stable . . . . Very local areas have ozone damage ( to trees ), but it hasn't led to a big die-off . . . . There are some moderate declines in areas, but they're matched by moderate increases in other areas, " said Greg Greenwood, a research manager in the Fire and Resource Assessment Program at the state Department of Forestry and Fire Protection.
