Re: How do you differentiate...
The earth’s atmosphere consists of 79% nitrogen, 20% oxygen, and 1% other gases. CO2 is a fraction of that 1% other gasses. What will be the effect of doubling such a small number? I don’t know. Perhaps it will have a big effect, perhaps not. Saying it will double may just be a scare tactic, or it may be a real concern. I’m not an atmospheric scientist, as most of us aren’t, so we just don’t know. Who do we believe?