There's good news and bad news when it comes to air quality in Israel. On the one hand, Israel's annual monitoring report for 2006 reveals improvements in air pollution, especially when it comes to pollution from transportation sources in Tel Aviv and Jerusalem. On the other hand, the situation is far from good as witnessed by the fact nitrogen oxides levels throughout the country remain high, ozone concentrations are on the increase and exceedances of the target standard for fine respirable particles (PM 2.5) are all too frequent, reaching 120%-214% of the annual target and as much as 233% in the vicinity of major transportation arteries.