Measures also aim to strengthen Single Market for packaging and facilitate cross-border business through common rules, EU says.
Researchers from Argentina, Bulgaria and Uruguay join 6th National Arctic Scientific Research Expedition.
1 in 3 of 391 samples collected from sea, lake waters found polluted.
Environment Agency says persistent pollutants, including heavy metals left behind by historic mining, can take decades to break down, in some cases continuing to accumulate.
City plans legal action following fuel oil contamination.