It really depends on what is the actual feedstock that you're using. We could use 100% hydrogen and that hydrogen could be made from all renewable energy sources. So in that case, there are no byproducts that are produced other than water, you know, from the hydrogen. If we're using a traditional fuel, let's say a biofuel or renewable natural gas or even natural gas, then the byproduct is you do have some carbon emissions. But if you're using biofuels or RNG, right, that's considered carbon neutral. And again, there's no combustion of the fuel.