I think what I said, and I may be corrected, is that for things like sequestration we need some support from governments to kick-start that notion and to develop the technology, the transportation systems that are necessary, and get some mechanisms in place that make it advantageous for conventional oil producers to use carbon sequestration as a way of enhancing their oil recovery. If we do that and put it together in a package, then it would start to get attractive for the industry to pursue and follow.
We've been studying this. It's not new, and it's not an idea we're just sitting back and waiting for someone to do something on. We've been studying it and working on it at the Alberta Chamber of Resources level, and it's going to take that kind of support from both levels of government to make it happen and to move it forward.
Can I just make one other comment? There's an important point here that we need to take into account. One way of reducing the CO2 emissions from the oil sands would be to sell bitumen only and not upgrade it. It's on the upgrading side where we make most of our CO2. We take natural gas and we knock the carbon out of it; we take the hydrogen and use it in converting the heavy oil into light oil that we send to market. We add value to it by doing that. This is where we get the value-added from the upgraders.
Our expansion, which you witnessed yesterday, was an $8.5 billion capital expenditure, and $1.5 billion of that was directed at environmental initiatives. One of them was to reduce our SO2 levels. Nobody has asked about SO2 today, but we've reduced that dramatically. We've added 100,000 barrels a day of crude oil production and we've reduced our SO2 on an absolute basis by fifteen tonnes a day.
We've also improved that product so it's more amenable to refineries to meet the California diesel spec. The California low sulphur diesel spec requires a better crude oil going into the upgraders or into the refineries to do that. We've upgraded the product we make at Syncrude so that the refineries that are trying to make California diesel have a better chance of doing that. When we do that we make more CO2.
I guess we could avoid making the CO2 by not trying to satisfy that requirement or by shipping a lower-grade product. We've taken the position that we don't want to pipeline those jobs down to the United States, because that's essentially what we'd be doing.