For the first time, researchers have proof that the ozone hole is indeed healing due to human activities. NASA’s Goddard Space Flight Center (GSFC) has been studying the chemical composition of the ozone layer. Every September, the ozone layer over the Antarctic breaks down due to a reaction with solar rays. This breaking down is mostly due to chlorine and bromine, which are released through chlorofluorocarbons (CFC). CFCs have been banned internationally ever since 1996.
Recently, the GSFC’s studies of the ozone hole reflected something promising. The chlorine levels near the ozone layer over the Antarctic have declined considerably. Consequently, ozone depletion is now lesser than before. It is estimated that the ozone hole will recover completely by the year 2060. This gives the climate change battle more hope, proving that small steps can make great differences.
Image credit: NASA
School of Science 