Romania is committed to preventing climate change and reducing carbon emissions. Air pollution is a major concern in Romania, with many premature deaths associated with particulate matter, ozone and nitrogen oxides due to exceeding EU air quality standards. More than 28% of Romania's rivers fall below EU water quality limits, with major pollution caused by untreated wastewater from cities including Bucharest, which is the only European capital without a sewage treatment plant. There are over 1,000 contaminated sites across Romania where extensive pollution has been proven or is potentially present.