At the current permanent sequestration rate of CO2 into Limestone, all
life of all forms on planet Earth could be extinct in as short as 54,286
years as we run out of CO2. During ice ages the cold oceans sequester
CO2 out of the atmosphere and into the oceans. During the last ice age
which ended just 12,000 years ago, CO2 dropped to 180 ppm. Plants do not
grow with CO2 at 150 ppm or less. There is evidence of plant stress
during this last ice age period. All our food comes from plants. Without
CO2 there will be no plants and therefore no life on planet Earth at
all. We were a mere 30 ppm short of the total extinction of all life on
Earth.