G'day mate,
it is believed that the atmosphere was predominantly composed of carbon dioxide, which would have put its CO2 concentration, in terms of the units most commonly used today, at something on the order of 1,000,000 ppm
I may not always be the sharpest knife in the drawer, but isn't 1,000,000 PPM the same thing as 100%? Is the author saying that the earliest earth atmosphere was 100% carbon dioxide? I think that the assumption of 1,000,000 PPM may be a wee bit of an exaggeration. 100% leaves no room for dust particles, no room for other gases like nitrogen, oxygen, or helium, no room for ammonia, no room for sulphur, no room for...
Eh?
EK!!! |
