The Environmental Protection Agency identified Rockport as the sixth largest carbon polluter nationally in 2014.
A coal to natural gas plant that could be built in Rockport is in the hands of the Indiana Supreme Court.
The court is determining whether a contract between the state and the company in charge of the coal gasification plant is valid.
The bill would require the state regulatory commission to look at the contract again if the state Supreme Court does not uphold it.
The Rockport plant would take coal and process it into various substances, including synthetic natural gas, which burns just like traditional natural gas.
Once completed, Indiana will sell energy from the coal gasification plant in Rockport even if there are cheaper options.