Original sentence: , however in 2003 the ozone hole grew to it's second largest size.In a 2001 report, NASA found the the ozone hole over Antarctica had remained the same size for the previous three years
Edited sentence: However, as of 2001, the ozone hole over Antarctica has yet to show any change in size , casting doubt on many of the early preditictions the Montreal Protocol was based on that indicated the hole was a direct result of human CFC production and release