Without getting too far of track here...yes the gaseous pollutants emitted by machinery as used on cruise ships and motor vehicles is quantifiable and certain environmental or political groups make great use of this data in their advertising causes
However, one
spit from a semi dormant volcano situated in the ring of fire produces potentially a million fold volume of equally noxious gasses, however the actual output is incalculable & at best left as estimates
These however these accepted as beyond the grasp of human technology to harness or stop
Scientists do however understand the volume of methane produced by the worlds milk cow herds.......& yes China is the worlds largest consumer and importer of powdered milk formula...should we ban or restrict the use of cows in the food chain?
Did all of those years of those beautiful coal burning steam engines do irreparable damage to our human existence?...were the infamous smogs of London created by this use of coal, or were cows a partial contributor?
The burning of the Amazon rain forests or similar illegal forests burning in Indonesia
.....no Government appears able or willing to stop these activities......and yet these Countries delegations vote at World Trade & Economic conferences to limit
Green House gases
I have a similar view to our member Plague....I would choose not to venture too far
on an
LNG fuelled [potential time bomb] vessel
Enough said...... Derek