Not just a carbon sink: weathering found to drive ancient global warming. Until recently, weathering was primarily considered a way in which carbon was removed from the atmosphere. However, weathering can also intensify warming on geological timescales when the rocks being eroded are rich in carbon

Think of the calls to geoengineer the climate system by pumping sulfate aerosols into the atmosphere to reflect incoming solar radiation……. the sulfates have to be continually replaced because they wash out of the air as acid rain. The acid rain dissolves limestone formations, concrete, and cement in a reaction that releases lots of CO2.

Absolutely brilliant!

/s