Kelly Clarkson | Jeremy Clarkson | Adrienne Clarkson | Thomas Clarkson | Patricia Clarkson | Clarkson University | Thankful (Kelly Clarkson album) | Jonathan Clarkson Gibbs | Jeremy Clarkson's Extreme Machines | Clarkson Golden Knights men's ice hockey | Clarkson | Because of You (Kelly Clarkson song) | Thomas Clarkson's | Nathaniel "NJC" Clarkson | Nathaniel James Clarkson | Laurence Clarkson | Lana Clarkson | James S. Clarkson | Greatest Hits: Chapter One (Kelly Clarkson album) | Clarkson performing "Mr. Know It All" Stars for Free music festival in Berlin | Clarkson, Ohio | Buster Clarkson | Be Still (Kelly Clarkson song) |
In September 2003 he signed an agreement with Cameroon's Minister of Environment and Forestry Chief Tanyi-Mbianyor Clarkson for a transboundary protected area combining the Takamanda and Okwangwo reserves to protect the Cross River gorilla, the world's rarest subspecies of gorilla with only 280 individuals throughout its entire range.