Dr Ball has been involved in a number of lawsuits with AGW supporters. In 2006 he sued a university professor, Dan Johnson, as well as his employer, the University of Lethbridge, for libel when Dr Johnson wrote a letter to a local newspaper questioning Dr Balls qualifications. | Dr Ball has been involved in a number of lawsuits with AGW supporters. In 2006 he sued a university professor, Dan Johnson, as well as his employer, the University of Lethbridge, for libel when Dr Johnson wrote a letter to a local newspaper questioning Dr Balls qualifications. |