A Sierra Club report indicates 16 coal plants in Indiana are discharging toxic metals into rivers.
The coal gasification plant that has been in construction for the past five years is operating commercially.
The agreement requires Duke Energy to absorb nearly $900 million for the construction its Edwardsport coal gasification plant.
State law requires Duke Energy to remove contaminated soil at former gas plant site in Franklin.
Duke Energy officials say they have nearly all the factors in place to burn synthetic gas—the main component in the gasification process.
Sweltering weather at week's end could be offset by power companies turning down thermostats for customers -- and offering accompanying rebates.
Duke Energy has agreed to absorb some of the costs it would take to build a new gasification plant in Edwardsport.
Indiana University participated in a national collegiate competition to save electricity and water.
An injured whooping crane was found in Vermillion County on Monday. It has since died from its injuries.
No tornadoes have been confirmed yet by the National Weather Service.