Baltimore County has became the latest local government to complete a “carbon footprint” inventory, setting a goal to reduce greenhouse gas emissions by 10 percent over the next four years.

The county joined the state of Maryland, Howard County, Baltimore City and Annapolis to commission an assessment of greenhouse gas emissions generated by government operations. Released Friday, the report estimates that county government emitted 142,700 metric tons of environmentally unfriendly gas, a fraction of the 11.5 million tons emitted by the county at large.