One of the winners of the 2016 Presidential Green Chemistry Challenge Awards was a process for making a high octane feedstock for gasoline. The traditional process uses higly corrosive acids such as hydrofluoric acid or sulfuric acid. Once used, the remaining acid must be regenerated or sent for disposal, requiring additional energy and generating waste. The new process uses a safer solid catalyst that can be regenerated and reused. It also leads to minimal by-products. Which principles of green chemistry are being followed by this new process compared to the older process?