
On the heels of our reporting about Canada's probable move to ban BPA plastics comes a story about researchers working at Missouri University of Science and Technology to develop hybrid plastics that would biodegrade in landfills within four months. As our editor Nicole Dyer pointed out in a comment to the BPA post, the larger and more important issue facing plastics is their propensity to stick around forever. As we pointed out in our article about the waste gyre in the Pacific Ocean, plastics will eventually photodegrade into microscopic bits, but those polymer molecules will forever be inorganic toxins. The Missouri S&T scientists are working to change that by focusing their attention on a biodegradable polyester.
Polylactic acid is a polyester derived from corn starch which decomposes and mineralizes into water and carbon dioxide when composted. It's already being used in some brands of compostable "plastic" bags. The team is working to blend the acid with other bio- and oil-based polymers to find the right kinds of resins for commercial use. They're also looking at repurposing waste materials resulting from biodiesel refinement—anything that can be culled from renewable sources. Whether this is a long-term solution remains to be seen.Via PhysOrg

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Comments
it could use farm crops such as corn or wheat and raise the price of food and sugar supplements .
2 out of 2 people found this comment helpfulAnother crap idea from some hippies that can't look 2 feet into the future. Why don't we just start building everything out of things people eat, like rice or some other staple food? Yay for hunger! Yay for deforestation!
1 out of 3 people found this comment helpfulfrom Amherst, MA
They can be made out of any kind of starch. My company is also making biodegradable bags out of ground limestone.
Adam R Sweet, Director of Operations
1 out of 1 people found this comment helpfulTwoTree International, LLC
http://www.twotreellc.com
Good one keep em common:YAY...Good shopping
0 out of 1 people found this comment helpfulMatthew T. Gossar
i dont understand why so many people seem to think that the more we use food products for non food related purposes (biofule, etc) the less food the world will have to eat? Last time i checked, not every ounce of freeland has been converted into farmland people. its called supply and demand....sure if we only had X ammount of food to use this might be an issue...but guess what? once there is more demand or a need, something magical will happen! More people will go into farming, more land will be converted to farmland, more food will be grown. Obviously its a bit more complex then that, but still, thats the gist of it.
0 out of 1 people found this comment helpfulI think it's great that people want to make the move into a more 'environmetaly concious' lifestyle, but there can be drawbacks... I think sublumjack1 makes a great point- more demand, more supply. But everything is working on a ratio, not a straight scale. If there are more people being born exponentially we need to consider the fact that more land will be used for housing and businesses, not just farming. (not to mention all the food required for the newborns.) There is only so much land on our earth that is exploitable for farming, and quite frankly people will NEVER stop having children... (even in China.) There needs to be a balance somewhere... REUSE for SUSTAINABILITY, lets not try to figure out how to use more resources, lets just make it durable enough to last for MANY uses. Car companies- make designer totes that come with the car in a glove box, no more people forgetting their bag at home! Just a thought...
0 out of 0 people found this comment helpfulOnce again, self-proclaimed "environmentalists" prescribe a "cure" that makes everything far, far worse.
Here's what an article in Britain's (very left-wing) "The Guardian" newspaper says:
"The substitutes can increase emissions of greenhouse gases on landfill sites, some need high temperatures to decompose and others cannot be recycled in Britain.
Many of the bioplastics are also contributing to the global food crisis by taking over large areas of land previously used to grow crops for human consumption."
More here:
1 out of 1 people found this comment helpfulhttp://www.guardian.co.uk/environment/2008/apr/26/waste.pollution
I like the limestone idea for bags and we have to make sure the environment is safe for right now. Also, some people seem to think that there is unlimited land so the demand and deforestation can increase. To a point it can increase, but then the animal world falls out of kilter. The industries just need to be careful when they increase and not think about the ALL POWERFUL DOLLAR. The corn starch bags would make corn farmers richer, but make other people who use corn products poorer.
0 out of 0 people found this comment helpful