SPRINGFIELD — The Effingham County Industrial Development Authority (IDA) has determined that a unified voice is more likely to be heard when pitching Effingham County’s industrial assets.Near the end of its Thursday meeting in the IDA building conference room, IDA members discussed ways to market the county’s industrial sites more effectively. It also talked about enhancing its profile and taxpayers’ understanding of its role.The IDA pursues industries for its multiple sites. Industries with good-paying jobs are preferred.“Everything that we do here is using taxpayer dollars,” said Jimmy Wells, IDA vice chairman.