<Li> The fungus Aspergillus fumigatus effectively degrades plasticized PVC . Phanerochaete chrysosporium has been grown on PVC in a mineral salt agar . Phanerochaete chrysosporium, Lentinus tigrinus, Aspergillus niger, and Aspergillus sydowii can also effectively degrade PVC . Phanerochaete chrysosporium was grown on PVC in a mineral salt agar . </Li> <Li> Acinetobacter has been found to partially degrade low molecular weight polyethylene oligomers . When used in combination, Pseudomonas fluorescens and Sphingomonas can degrade over 40% of the weight of plastic bags in less than three months . The thermophilic bacterium Brevibacillus borstelensis (strain 707) was isolated from a soil sample and found capable of using low - density polyethylene as a sole carbon source when incubated at 50 degrees Celsius . Pre-exposure of the plastic to ultraviolet radiation broke chemical bonds and aided biodegradation; the longer the period of UV exposure, the greater the promotion of the degradation . </Li> <Li> Less desirably, hazardous molds have been found aboard space stations, molds that degrade rubber into a digestible form . </Li> <Li> Several species of yeasts, bacteria, algae and lichens have been found growing on synthetic polymer artifacts in museums and at archaeological sites . </Li>

How many different kinds of plastic are there