Paul Crutzen in this science video lecture recorded in 2006 has chosen to speak about many of the changes such as population growth that have taken place over his life span and the effect that this has had on changes in the atmosphere.  One such change is the amount of carbon dioxide in the atmosphere.  Another change is the warming of the atmosphere.

In 1995 Paul J. Crutzen shared a third of the Nobel Prize in Chemistry with Mario J. Molina and F. Sherwood Rowland for their "work in atmospheric chemistry, particularly concerning the formation and decomposition of ozone"

Nobel Website
Autobiography

Lindau Meeting of Nobel Laureates
Lindau Meeting website