A Wisconsin state board has prohibited its employees from working on global warming issues on state time, including the daughter of the founder of Earth Day.

The Board of Commissioners of Public Lands voted 2-1 on Tuesday to ban staffers from working on global warming while on the state clock.

Republican State Treasurer Matt Adamczyk, one of the board members, proposed the ban because he said he believes executive director Tia Nelson worked on global warming issues on board time. Adamczyk said the topic has nothing to do with the board's responsibilities.

Nelson is the daughter of former Wisconsin Gov. Gaylord Nelson, a renowned conservationist who founded Earth Day. She didn't immediate return voicemail or email messages.