Two very important papers are just out by Joe Romm. Hae a look.
1) Why scaling bioenergy and bioenergy with carbon capture and storage (BECCS) is impractical and would speed up global warming
Bioenergy with carbon capture and storage (BECCS) has generated great interest as global emissions have soared to 50 billion tons (Gt) a year of CO2 equivalent. In theory, biomass could remove CO2 out of the air as it grows, and a CCS system on the bioenergy power plant could permanently bury the CO2, making BECCS potentially a “negative” emissions technology.
But a growing body of research casts doubt on whether either bioenergy or BECCS are scalable climate solutions—or solutions at all. Those doubts are reinforced by findings from the first dynamic, integrated global modeling of BECCS by the researchers of Climate Interactive:
2) Why direct air carbon capture and storage (DACCS) is not scalable and ‘net zero’ is a dangerous myth
As global emissions have soared to 50 billion tons (Gt) of CO2 equivalent, carbon dioxide removal (CDR) strategies have generated great interest. The three most widely analyzed and modeled are direct air carbon capture and storage (DACCS), which pulls CO2 directly out of the air and stores it underground; planting trees; and bioenergy with carbon capture and storage, whereby growing biomass removes CO2 from the air and a CCS system on the bioenergy plant could permanently bury it.
In theory, by combining deep emissions cuts (achieved by substituting carbon-free energy for fossil fuels) with a scaled-up CDR effort, we could bring total emissions down to “net zero.” But as other white papers in this series have explained, scaling tree planting faces major challenges, and scaling BECCS is impractical and would speed up global warming this century.