 So in Paris, it's a very old kind of water system they have there. It mixes the sewer water with regular runoff water. And when there's a very big rainstorm, which happens, it seems, about once a month there, a lot of those rice water and the regular water will mix, and the runoff will go into the Seine, and then you have wastewater in the Seine. So they need to solve that problem, and they need to make sure that when it rains, and they have to hope it doesn't pour, that that water isn't running into the river.