NOT KNOWN FACTUAL STATEMENTS ABOUT BơM MàNG KHí NéN

[NARRATOR] Unpredicted pockets of rather new oil, gravel seashores that returned practically to ordinary just after 4 or 5 years, animal populations which have recovered or remain wanting to Recuperate nowadays...how can experts contend with a lot usually conflicting info? How can we know if modifications or recovery times are due to the oil spill