According to the NASA site, atmospheric C02 is currently at 400ppm (0.04) and rising exponentially (and some)...
However, according to 'A Compendium of Chemistry' by Arnold & Mandel (1914)...
"The amount of carbon dioxide in the air amounts on average to 0.04 volume percent [400ppm], but may rise to one or two percent in rooms occupied by many persons or by the burning of many gas flames; experience has shown that it is not advisable to have more than 0.1 volume percent in a room for habitation. The purity of the air can be determined by estimating the amount of carbon dioxide contained therein."
So despite NASA's rather alarming looking graph, the amount of atmospheric CO2 is the same today as it was over 100 years ago.
It's only by referring to very old books written before the climate change agenda was drawn up that we can see the 'man-made global warming' meme is based on nothing but LIES.
If anyone I haven't plonked wants a scan of the original page from the
1914 volume I'm happy to supply it via email.