Shipping is a pretty dirty industry, because of fuel quality they use and the general lack of oversight in the middle of the ocean.
I was on the board of Corvus Energy (http://corvusenergy.com) while working in Norway, whose technology reduces CO2, SOx, NOx, and fuel consumption by up to 30%. One installation was the equivalent of taking 10,000 cars off of the road. Thankfully, there are developments in this space.
Bear in mind that shipping is also the most energy efficient form of bulk transportation (vs land or air).
I was on the board of Corvus Energy (http://corvusenergy.com) while working in Norway, whose technology reduces CO2, SOx, NOx, and fuel consumption by up to 30%. One installation was the equivalent of taking 10,000 cars off of the road. Thankfully, there are developments in this space.
Bear in mind that shipping is also the most energy efficient form of bulk transportation (vs land or air).