When you were asked to point the places with most carbon dioxide in the atmosphere on earth, you probably would think of China, Western Europe and the US coastlines. A mapping of carbon dioxide pollution matches very well with population density indeed. That’s not a big surprise, since mankind is a very large contributor to CO2 emissions. But something you maybe wouldn’t have tought about, is the shipping lanes used by hundreds of cargo ships carrying goods from oil over coal to bananas from one side of the globe to the other. This enormous ships burn what is called bunker oil, a sulfur rich fuel oil. At least 4% of the global greenhouse gas emissions are estimated to be emitted by shipping. Since the amount of goods shipped oversea is still on the rise, it’s definitely worth spending some more time and money improving ships’ efficiency and pollution.