Which of the following statements is true of "Earth’s Ozone Layer"?

JB: After 30 years of steady decline, Earth’s ozone layer is thinner but seems to be stable. A ban on ozone-depleting CFCs is largely responsible. Computer modeling gives reason to hope for an almost full recovery of Earth’s ozone layer within 60 years. But this sort of modeling is difficult -- and its predictions aren’t iron-clad.
DB: And some models show the ozone layer could face a new threat -- from global warming. Drew Shindell, an atmospheric scientist at NASA’s Goddard Institute for Space Studies in New York City, talked with us about his computer models of climate.

The U.N. agency says a shortage of roads, rail networks, ports and energy projects in rapidly- growing Asia threatens to hold back the region’s economies. At a two-day meeting in New Delhi, the U.N. agency called on Asia to invest more heavily in cross-border infrastructure projects to spur trade and investment in the region. Representatives of 20 countries attended the meeting, where a new study by Research and Information Systems, a New Delhi-based research institute, highlighted the infrastructure deficit in Asia.