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Dear EarthTalk: What are the environmental pros and cons of corn-based plastic as an alternative to conventional petroleum-based plastic? -- Laura McInnes, Glasgow, Scotland
Polylactic acid (PLA), a plastic substitute made from fermented plant starch (usually corn) is quickly becoming a popular alternative to traditional petroleum-based plastics. As more and more countries and states follow the lead of China, Ireland, South Africa, Uganda and San Francisco...
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"A cup made from PLA, plastic made from cornstarch." Image credit to"Bec, courtesy Flickr."
