A European Parliament effort to roll back policies and subsidies that encourage burning wood pellets for energy has suffered a potential setback.  The parliament's business committee, known as ITRE, voted last week to uphold the current policies that treat wood pellets as a carbon-neutral alternative to coal. That countered a vote in May by the parliament's environment committee (ENVI) that called for stricter limits on using "primary biomass" — or trees — for energy.  ITRE adopted its own revisions to the EU's Renewable Energy Directive that could actually expand subsidies to wood pellet users ...