how valuable oil tankers

ENVIRONMENTAL PROBLEMS WITH COAL, OIL, AND GAS- how valuable oil tankers ,The best method for establishing a connection between "normal" levels of air pollution and premature mortality is through comparison of mortality rates between different geographic areas with different average air pollution levels.2015 - OPECNotes: Totals may not add up due to independent rounding. Major OPEC flows of crude and refined oil (1,000 b/d) 2014 Questions on data Although comments are welcome, OPEC regrets that it is unable to answer all enquiries concerning the data in the ASB.