WoW! A shopping bag that dissolves in water. The bag is made of Polyvinyl, also called PVA. PVA can dissolve easily in water and is biodegradable. In hot water even within a few seconds. The bag disappears within 6 months if for example ended up in the ocean (depending on water temperature, turbulence, salinity etc.) You can just walk with the bag in the rain because it only dissolves if it is permanently in the water or submerged. The composition of polyvinyl alcohol is CH2-CH-OH and it splits when dissolved in water (H2O) and carbon (C). Carbon is not a gas and therefore will not enter the air as a greenhouse gas.