First let me identify myself by saying I am in the oil and gas industry. That being said, I also have some experience in sequestering CO2 into subsurface formations. CO2 injection into reservoirs that contain oil is another way to get more oil and gas out of the ground that would otherwise be left behind. After primary production we normally produce around 30% of the oil in place. Then we go to what is called secondary production and get anywhere from 20 to 30% more of the original oil in place.