9781422274583

S t r a t o s p h e r e a n d n a t u r a l p r o t e c t i v e o z o n e l a y e r ( 1 7 - 5 0 k m ) T r o p o s p h e r e a n d t r o p o s p h e r i c o z o n e ( 0 - 9 / 1 7 k m ) M e s o s p h e r e ( 5 0 - 8 5 k m )

Troposphere: 0-5.5/10miles Stratosphere: 10-31 miles Mesophere: 31-52 miles

5 10 15

20

Altitude (km)

A l t i t u d e o f m o s t c l o u d s

Tibet Ozone Hole In 2006, scientific research confirmed the presence of a 962,000 square miles (2.5 million sq km) hole in the low-level ozone layer over western China’s Qinghai-Tibet Plateau. In 2011, an ozone hole developed over the mountainous regions of Tibet, Xinxiang, Qing- hai, and the Hindu Kush.

Climate Facts

● ● By 2050, the ozone layer may heal completely as the usage of ozone-depleting substances has reduced drastically. ● ● About 7–10 percent of the ozone layer above the United States has depleted.

What Is Climate Change? 13