[Psycho_Bunny]

"Atmospheric carbon dioxide levels are rising today, and the new finding suggests that climate might be considerably more sensitive to changes in carbon dioxide than previously thought..."

Really? I call BS, because today's CO2 is around 0.038% but the Earth's early atmosphere is largely agreed to have been around 10%.

And look how we didn't turn into Venus.

[cpdiii]

More immediately, the work brings one line of palaeoclimate evidence — that deduced from ancient soils — into agreement with other techniques for studying past climate.

The first thing you need to know is when a sentence is totally incomprehensible and subject and verb are a bit hard to define, the author is probably lying.

Calcite is a form of Calcium Carbonate. The formation of Calcite is dependent on many factors. Solubility, PH, Temperature, pressure. None of those factors were addressed.