Nem éppen "fősodratú média":
REPORT FROM THE COMMISSION 2020 Annual Report on CO2 Emissions from Maritime Transport
"The 4th Greenhouse gas (GHG) study from the International Maritime Organisation shows that GHG emissions (including carbon dioxide, methane and nitrous oxide) from shipping
have increased from 977 million tonnes in 2012 to 1,076 million tonnes in 2018, representing
a 9.6% increase. The share of shipping emissions in global anthropogenic GHG emissions
has increased from 2.76% in 2012 to 2.89% in 2018."
Tehát, nem csak a CO2 van belevéve.

"Black Carbon emissions, acting at the same time as air pollutant and climate forcer and with high relevance for Arctic shipping, increased from 59 kilo tonnes to 62 kilo tonnes."
És hogy mennyi a 62K tonna?
Black carbon emissions from global shipping
"It was estimated that in 2015, ships emitted about 67,000 tonnes of black carbon, equivalent to 0.7–1.1 per cent of total global anthropogenic black carbon emissions."
Tehát, itt 67K tonnára becsülik 2015-re és az az érték, 0,7-1,1%-ot képvisel.