This is the kind of non-news that brings joy to people like Syne (no criticism intended - just as it is). Maybe plastic bags will have killed the lot of them. Maybe they'll all have gone into shark fin soup. Maybe, maybe, maybe.
The only acual data that might affect Syne is here:-
https://www.esrl.noaa.gov/gmd/ccgg/trends/full.html
(am I wrong?). By the time children leaving school now are my age it will 520ppm of CO2.
Good thing, bad thing or nothing?