Environmental hazard. Data from the International Tanker Owners Pollution Federation Limited (www

.itopf.com) give the cause of spillage for small and large oil tanker accidents for 1970–2017. Draw a graph comparing the causes of small spills with the causes of large spills. Give a reason for your choice of graph and write a short report (40–60 words) comparing the causes of the different sizes of spills. (Source: Based on ITOPF: Oil Tanker Spill Statistics 2017.)

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Number of Spills From Oil Tankers 1970-2017 Percentage of Small Spills < 7 tonnes Percentage of Large Spills > 700 tonnes Collision 2% 29% Grounding 3% 32% Hull Failure 7% 13% Equipment Failure 22% 4% Fire/Explosion 2% 12% Other 23% 7% Unknown 41% 3%