The ads can be viewed here.
The ads will begin airing in Indiana and Maine on Friday, and Missouri and Arkansas early next week, said a spokeswoman for Gore’s group, who declined to provide the cost of the ad buy.
The ads will air widely in the states on local and cable networks for three weeks, spokeswoman Giselle Barry said in an email.
Senators such as Evan Bayh (D-Ind.), Claire McCaskill (D-Mo.), Blanche Lincoln (D-Ark.) and Maine’s two GOP senators are considered swing votes in the fight to impose mandatory caps on greenhouse gas emissions.
The ads draw on videos posted on the “Repower Wall,” a site where people and businesses upload messages in support of low-carbon energy sources.