This week, the Supreme court heard arguments on two cases that could redefine pipeline construction and the amount of biofuels in America’s gasoline. POLITICO’s Kelsey Tamborrino and Alex Guillen followed along, and they explain the stakes in these cases. Kelsey Tamborrino is an energy reporter and author of Morning Energy. Anthony Adragna is an energy reporter for POLITICO and host of POLITICO Energy. Alex Guillen covers the EPA and environmental issues for POLITICO. Carlos Prieto is a Politico podcast producer. Jenny Ament is the senior producer of POLITICO audio. Irene Noguchi is the executive producer of POLITICO audio.