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what about diapers or other plastics (trash, grocery, and merchandise bags) now being marketed as "degradable" and "safe for the environment"?. Don't be fooled. A truly degradable plastic isn't yeton the market.
Some plastics are called "photodegradable". They have to be exposed to sunlight order to break down-but the garbage in landfills isn’t exposed to sunlight.
Others, labeled"biodegradable", break down in the presence of bacteria. They contain an additive, usually cornstarch, that allows them to degenerate, but it constitutes only 6% to 10% of the item's volume. Once the bacteria inthe soil eat the starch , the plastic degenerates into many little plastic pieces, which can be carried away from the landfill and deposited in streams and oceans. Furthermore, extra plastic has beenadded to the item in the first place to compensate for the weakening effect of the cornstarch, so the total volume of plastic reaching the landfill hasn't been reduced at all.
A truly degradableplastic, one that degrades completely and harmlessly, will have to be made entirely from starch. Until such a product is developed, you're not doing the environment a favor by buying so-calleddegradable plastics.


¿Qué pasa con los pañales y otros plásticos (basura, comestibles y mercancía bolsas) que se comercializan como "biodegradable" y "seguros para el medio ambiente"?. No se dejeengañar. Un plástico degradable realmente todavía no está en el mercado.
Algunos plásticos se denominan "fotodegradable". Ellos tienen que estar expuestos a la luz solar para romper, pero la basura en losrellenos sanitarios no está expuesto a la luz solar.
Otros, etiquetado como "biodegradable", se descomponen en presencia de bacterias. Ellos contienen un aditivo, por lo general almidón de maíz, queles permite degeneran, pero constituye solamente 6% a 10% del volumen del material. Una vez que las bacterias en el suelo comen el almidón, los degenerados de plástico en muchas piezas de plástico...