Designs for executive action to limit greenhouse gas emissions in Oregon have long been in the works, records show

Gov. Kate Brown speaks at a rally promoting carbon capping legislation.

For more than a year, Gov. Kate Brown’s environmental agency has been assessing how the governor could mandate lower greenhouse gas emissions without voter or legislative approval, according to interviews and public records.

Brown has said she’s willing to act with her executive authority if lawmakers and industry don’t reach agreement on ways to limit greenhouse gas emissions over the next several decades.

Her…