Forest advocates say zero-carbon goals too reliant on unrealistic tech: "The problem: the emissions reduction goals of international energy companies in Marrakesh appear to be hinged on unrealistic means. These companies keep promoting new technologies to enable the continued burning of fossil fuels and carbon-based energy, one being “bioenergy carbon capture and storage,” or BECCS. In this scenario, huge forests would be grown primarily to be burned as biomass with the carbon released from this energy production theoretically captured and stored.
Critics here argue that the technology is not only land-use intensive, but also that carbon capture is costly and largely unproven. Other forms of geoengineering that would allow further fossil fuel use, like space deployed sun shades, are generally deemed by climate scientists as equally unworkable, if not laughable."