Sure. As I mentioned earlier, one of the ways we're looking at doing this is by focusing on the 20% that are heavy emitters, which gets us the biggest bang for the buck in the investment side of it.
The other way of doing it is by looking at how we invest in real estate decisions a little bit differently. When we go forward and ask for permission from central agencies for major rehabilitation, you don't do those every 10 years. That is something you do maybe in the life of a particular building around every 40 years for an office tower, by way of example. What we do is to try to look at what the cost would be over a life cycle. I mentioned that we're adjusting our finances to an accrual-based budgeting methodology. That allows us to amortize investments over a longer period of time.
One of the ways we look at it is to look at what we could get to a LEED gold or silver standard. Then we'd take it to another GHG or net zero carbon-type facility, and then we look at a hybrid of the two from a cost analysis over a 25 or a 35-year period, depending on the asset.
What we're finding is that, for a small increase in initial capital cost, our predictions over the life cycle, which will have to be measured on the returns on investment, etc., can jump from, say, a 25% reduction in GHG to a 94% reduction in GHG with maybe about a 6% to 12% investment up front, and then—