That's a good point, but its going to take gigantic social transformations to be able to sequester all the remaining oil, there is about 800 Gtonn CO_2 in the g

That's a good point, but its going to take gigantic social transformations to be able to sequester all the remaining oil, there is about 800 Gtonn CO_2 in the ground and about 200 or 400 Gton CO_2 of total cumulative emissions if you aim for 1.5 or 2 degrees C.