Getting rid of 4% of the total human CO2 emissions is huge. On top of that pollutants like fine particles. Switching to mostly-sail powered shipping reduces al

Getting rid of 4% of the total human CO2 emissions is huge. On top of that pollutants like fine particles. Switching to mostly-sail powered shipping reduces all emissions of a ships engine by 90% in one big step, the remaining 10% are even easier to clean up, as scale matters.