After a light score (red, yellow or green) has been given to each methane output score or landfill gas indicator, the DST allows the user to view the cause and effect of an indicator having a red or yellow light and highlights potential remedies for that indicator to produce a higher methane output rate (Table 4). Literature sources of leachate data are displayed in the tool. Some remedies mentioned in the table are restricted by the lack of ability to apply them retrospectively including reducing waste density and the mixture of wastes added. The remedy most used at the field scale level to improve overall methane generation is leachate recirculation. This aspect of the DST is intended to enhance the general understanding of the effect of each indicator on methane output production and possible remedies. It is not intended as comprehensive advice on how to resolve landfill methane generation issues. Potential remedies need to be assessed on a site-specific basis.