If the bag is true cellophane (loud and crinkly),they are made from wood or cotton cellulose. These are renewable materials and compostable BUT the process of converting cellulose to cellophane (tons of chemicals) is very polluting and energy demanding.
Why am I not surprised? Most liberal attempts at reducing energy consumption or "going green" typically end up being even worse than whatever perceived problem they're trying to solve. More smoke and mirrors "feel good" technology.
BINGO