Yolo County's soil is heavy in clay and would otherwise impede the flow of water. Greenwaste allows the water to flow freely through the waste, stimulating rapid decomposition. The problem with conventional landfills and dry decomposition is that it takes several decades for the waste to fully decompose. A bioreactor landfill avoids the problem of future liner failure because the waste decomposes in only 5 to 10 years. But there's more.
Landfill wastes produce gases, principally methane, as they decompose.
Second, capturing and using methane gas for power would prevent it from escaping into the atmosphere, decreasing greenhouse gas emissions by an estimated 40 million metric tons per year. That's precisely what the Yolo County Landfill is doing today. Yolo County, today, is using the landfill technology of the future.