Are humans really behind the extra CO2 in the atmosphere?

The planet is warming up to the warming is caused by a huge amount of extra CO2 that has been added to the atmosphere.

But how do we know that we humans are responsible for that extra carbon and so that warming? Well let me present to you 3 reasons Old Town Newtown and Flavour Town Old Town .

99% of the carbon in the atmosphere is carbon 12 and 1% carbon 13 , with about a billionth of a percent carbon 14 .

Carbon 14 is radioactive and so it decays into other elements over time.

By contrast, carbon emissions from volcanoes contain more carbon 13G2 , carbon 12 being more easily incorporated into crystal structures like rock below ground, leaving the carbon 13 in the gases that get ejected from volcanos.

The lack of carbon 13 tells us that it can't be from volcanic sources and the lack of.

carbon 14 tells us it must be from an organic source that is very, very old.

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