David Douglas, vice president for eco-responsibility at Sun Microsystems, raised an interesting question in his blog yesterday. Sun, which released its latest CSR report earlier this month, is pretty open with the fact that it’s not ready to go carbon neutral because the company is currently focused on lowering its carbon footprint by investing in projects that have a clear ROI, rather than investing in offsets.

“There is a cost to this strategy, and that cost is that we can’t claim that we’re carbon neutral,” Douglas writes. “Right now that’s a cost we’re willing to live with.”

Then Douglas asks if a company can be double carbon neutral? “If it is good to offset your emissions, is it even better to offset your emissions twice?” Douglas asks.

It’s an interesting question. As company’s continue to raise the green PR stakes, we could see moves like this down the road.