Changes

Other authors have proposed their own biodegradation scales, e.g. Another biodegradation scale is Wenger et al. although that scale only describes the oil based on very slight, slight, moderate, heavy and severe biodegradation levels. The scale is based on the presence or absence of specific compound classes ([[:File:GeoWikiWriteOff2021-Aljezen-Figure6.jpg|Figure 6]]). The main problem with these scales is that, there are insufficient changes observable in chemical classes at very high biodegradation levels (heavy to severe) thus biodegradation between PM 5-8 on the PM scale and heavy to severe on Wenger et al. scale.

Other authors have proposed their own biodegradation scales, e.g. Another biodegradation scale is Wenger et al. although that scale only describes the oil based on very slight, slight, moderate, heavy and severe biodegradation levels. The scale is based on the presence or absence of specific compound classes ([[:File:GeoWikiWriteOff2021-Aljezen-Figure6.jpg|Figure 6]]). The main problem with these scales is that, there are insufficient changes observable in chemical classes at very high biodegradation levels (heavy to severe) thus biodegradation between PM 5-8 on the PM scale and heavy to severe on Wenger et al. scale.

[[File:GeoWikiWriteOff2021-Aljezen-Figure6.jpg|thumbnail|Figure 6 shows the Wenger 2002 scale with the corresponding PM scale and the key compounds altered or removed. <ref name="15Larteretal" />]]

[[File:GeoWikiWriteOff2021-Aljezen-Figure6.jpg|framed|Figure 6 shows the Wenger 2002 scale with the corresponding PM scale and the key compounds altered or removed. <ref name="15Larteretal" />]]

==What are the effects of biodegradation on crude oil economically?==

==What are the effects of biodegradation on crude oil economically?==