As cities like Madison, or counties like Dane, expand at record rates, we’re faced with a puzzle: how do we house a booming population without paving over the farmland that defines our state? Capital Area Regional Planning Commission Executive Director Jason Valerius tells Stephanie Hoff that his job is to focus on water quality and land use, which come together to require conversations about the relationship between ag and urban areas. It starts with a look at how the population is changing in Dane County. He has statistics.