Comments on: Biodegradable Plastics: Technology that Saves Our Planet from Plastic Pollution

By: Keshia Helwick

Keshia Helwick — Mon, 13 Sep 2010 05:26:17 +0000

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By: plastic crate

plastic crate — Sun, 05 Sep 2010 00:16:37 +0000

Interesting I may have to get some of these

By: Forex Signal Provider

Forex Signal Provider — Wed, 01 Sep 2010 06:20:34 +0000

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By: Emmitt Leimkuhler

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By: Ara Allemond

Ara Allemond — Sat, 21 Aug 2010 21:29:03 +0000

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By: Leslie

Leslie — Wed, 23 Sep 2009 23:34:45 +0000

Your data is incorrect. First of all, PLA uses more petroleum in its development than plastic.(see “How Green are Green Plastics”)They off-set this by buying energy credits. PLA will take 400-500 years to break down in a landfill, just like a normal plastic.PLA will also not break down in a backyard compost. The only place it will break down are in commercial and municipal composts that accept PLA.(see ASTM 6400 which is the standard PLA meets) There are 87 such locations in the US.So the chances of it ending up there are slim.They need high amounts of heat, aeration, and moisture than found in a backyard compost.According to the EPA 2007 table of “Characteristics of Municipal Waste by Weight” plastic takes up 12% of a landfill. Paper and fiberboard takes up 32.7%.PLA and corn based ethanol are responsible for the shortage of food around the world and its increased prices. Nitrogen runoff from corn fertilizers has created a dead zone the size of the state of New Jersey in the Gulf of Mexico, where nothing can live.PLA is not a good choice. There are biodegradable additives that can be put into plastics that enable them to biodegrade in landfills in 1-10 yrs. They then create methane which is now being harvested at 75% of all US landfills for energy to make electricity. PLA is the worst choice for biobased products. Look for others crops that can be made into containers and are backyard compostable.