The Wall Street Journal reports that a new European digital privacy law could have serious implications for online advertising in the region, threatening everyone from ad tech middlemen to publishers to Web giants like Google and Facebook, industry executives say. "European Union officials reached an agreement Tuesday on the pan-European law, creating a strict new legal framework that dictates how companies can use individuals’ personal information. The law requires approval from the EU Parliament and European governments. The new rules could limit the ability for companies to collect and process online data, a practice on which many business-to-business online advertising companies currently rely. Such companies include Google, Yahoo, Criteo, AOL, Rubicon Project, OpenX and many others," the Journal reports.