This is a bit disturbing, I wonder if this is just a case of the DailyFail inflating headlines bombastically with the modern age yellow journalism they are known for (I'm not even saying this in a negative way, people subscribe to them just for this, its their thing, its what they do).
How about similar sentiments from a publication antithetical to the Daily Mail? The Guardian reported several years ago about how 'one giant container ship can emit almost the same amount of cancer and asthma-causing chemicals as 50m cars': http://www.theguardian.com/environment/2009/apr/09/shipping-... - though that isn't focusing on CO2 necessarily, but earlier Guardian articles talk about how shipping emits twice as much CO2 as aviation, etc.
Given that there is no discussion of pollution per cargo-ton mile or the number of deaths caused by, say, pollen production (which is killing me at the moment), I'm going with "yes."
