Utah is the first US state to officially declare pornography a public health crisis,
The state's move is aimed at shielding its citizens from an "epidemic" of addictive sexual content.
A major adult entertainment trade group dismissed the move as "noxious" and an "old-fashioned morals bill".
However, experts say it could open the door to other US states to follow suit.
"Pornography is a public health crisis. The problem is rampant, yet it thrives in secrecy and silence," said Gary Herbert, the Republican governor of predominantly Mormon Utah, after signing the resolution.
The resolution cites what it says are numerous detrimental effects of porn.
"Today's bills will start an open discussion, bringing its very real dangers to light," he said in a statement.
The state legislature approved the text earlier this year, calling for "the need for education, prevention, research and policy change at the community and societal level in order to address the pornography epidemic that is harming the citizens of Utah and the nation."
The resolution calls for people in Utah to cooperate in curtailing the consumption of pornographic material, in moves backed by several local groups including the Utah Coalition Against Pornography.
The Free Speech Coalition, a trade association for the adult entertainment industry, criticized the move.
"The claims and the implied proscriptions harken to the dark days before adult film was legal, and when sex and sexuality were only discussed behind closed doors, if at all," it said.
Harvard Business School professor Benjamin Edelman released a study in 2009 that identified Utah as the US state with the highest rate of people with online adult entertainment subscriptions, angering some in the state.