You know it’s crunch time when a potato-chip factory goes green. A Frito-Lay factory in Arizona has plans to produce, yes, carbon-neutral potato chips: sliced, fried, seasoned, and bagged in a plant nearly entirely off-grid and powered with renewable fuels. The company’s Casa Grande plant will make do in its desert locale by recycling water, and will advertise that it’s using solar power to make SunChips. Frito-Lay — which is owned by PepsiCo, the nation’s biggest buyer of renewable-energy credits — hopes to replicate successful measures in other factories.