Natan (Натан) Levert (Леверт), you are clearly not reading what i am writing, but only what you think i am writing
.
Anyway, i took a look at your sited article..
Lets check their first source, table (1) which they claim comes from a department of energy, yet when i follow the link they provide:
********cdiac.esd.ornl.gov/pns/current_ghg.html
it does not state anything about "natural" CO2 additions.
So, maybe it was updated, as the link sited 2000 version of the page, so i got that from archive.org
********web.archive.org/web/20010208121326/********cdiac.esd.ornl.gov/pns/current_ghg.html
still nothing of that sort.
SO, let me ask you, how did they come up with that?