Is Wales not one of the most effective recycling countries in the world? Why are incineration sites required?

Whilst Wales does undertake a significant amount of recycling, non-recyclable was is still being generated by household and commercial and industrial sources.  Landfill space is running out with the only landfill in Powys having a lifespan of only 2 more years.  Consequently, facilities like this will be needed to dispose of residual waste and also recover the energy contained within the waste.