Euros will soon replace pesetas, but it is not the only change in accounts. Almost without realizing it, plastic money has taken the turn to paper and although for us it is comfortable, for the environment has not been so beneficial. Credit cards are usually made up of mixtures of resins and plastics that, by not degrading, remain in nature for years. For this reason, the Swiss company Inter Bio Cards has prepared biodegradable cards. During their use they will not spoil us, but just throw them away can and disappear.