Single-family homes could be built on already developed lands (infill), such as abandoned industrial parks, and in some less developed areas, such as pasture previously used for cattle grazing. I envision these as dense developments that would not cause the suburbs to grow “exponentially”. The states could impose environmental impact fees on single-family home developments for funding land acquisition projects elsewhere to protect wildlife and create wildlife corridors. These fees need not be exorbitant. For example, in California the average cost of farm and ranch land is around $13,000 and $6,000 per acre, respectively. A per acre cost within that range could then be the basis for environmental impact fees for conservation land acquisition projects, passed on to developers and incorporated into the price of new homes, somewhere between $1,000 - $2,000 each, based on a lot size of 4,000-5,000 sq ft.