Causes of petroleum https://en.m.wikipedia.org/wiki/Environmental_impact_of_the_petroleum_industry Uses of petroleum http://www.yourarticlelibrary.com/essay/uses-of-petroleum-6-main-uses-of-petroleum-discussed/25416/ Remedial measures to control of petroleum products https://drive.google.com/file/d/0B6UrRA8egQjtY2MxdFpwaVppMmc/view?usp=drivesdk