Nueces County residents are being asked to do their part in the fight against global warming.

Nueces County Commissioners held a press conference Monday morning in the county courthouse to issue a challenge to the citizens of Nueces County. In September, county employees were first challenged to participate in the "Change a Light, Change the World" campaign, county officials said.

More than 25 percent of Nueces County employees pledged to change at least one incandescent light bulb in their homes to a compact florescent light bulb. CFLs last from seven to 10 times as long as other bulbs, use about a third of the energy, operate cooler and save as much as 450 pounds of greenhouse gas emissions, county officials said.

Nueces County employees finished in the top 10 for counties in the nation for number of pledges recorded, according to the Change A Light campaign.

In Phase II of the campaign, the county commissioners are now asking all citizens of Nueces County to pledge during the month of November.

Residents of Nueces County may fill out a pledge card anytime at the courthouse by dropping by the Human Resources Department on the third floor of the courthouse or by going online to the county Website and clicking the link in the middle column at http://www.co.nueces.tx.us/ or by going to the Change A Light address, www.naco.org/changealight.

It is estimated that if half of the resident homesteads in Nueces County changed one bulb in their home, it would reduce greenhouse gas emissions by over 29 million pounds and reduce energy costs by $2 million over the course of those bulbs lifetime, county officials said.