Pictures were taken from the following websites:
-http://worldmaritimenews.com/wp-content/uploads/2015/04/tanker-aground.jpg
-http://s3.amazonaws.com/kidzworld_photo/images/201064/61d08863-3586-479f-8896-2854787e8913/oil1.jpg
-http://worldmaritimenews.com/wp-content/uploads/2015/04/tanker-aground.jpg
-http://s3.amazonaws.com/kidzworld_photo/images/201064/61d08863-3586-479f-8896-2854787e8913/oil1.jpg