An older study, comparing production methods of different plastics:
http://www.news.pitt.edu/news/Landis_polymers_LCA
developments in recycling PLA
http://www.loopla.org/cradle/cradle.htm
Artificial fertilizers do their thing
An older study, comparing production methods of different plastics:
http://www.news.pitt.edu/news/Landis_polymers_LCA
developments in recycling PLA
http://www.loopla.org/cradle/cradle.htm
Artificial fertilizers do their thing
http://www.fertilizer.org/GlobalFertilizerTradeMap