New biochar model scrubs CO2 from the atmosphere
New Cornell University research suggests an economically viable model to scrub carbon dioxide from the atmosphere to thwart global warming.
The researchers propose using a “bioenergy-biochar system” that removes carbon dioxide from the atmosphere in an environmental pinch, until other removal methods become economically feasible and in regions where other methods are impractical. Their work appeared in the Oct. 21 edition of Nature Communications.
“If we continue on current emissions trajectories, we will need to draw down excess carbon dioxide from the atmosphere if we’re going to avoid catastrophic levels of climate change. We’re offering a mitigation model that can do that. It’s not a silver bullet, but it may be among the tools we need in a portfolio of carbon dioxide mitigation strategies,” said Dominic Woolf, Cornell University research associate in crop and soil sciences and lead author of the study.
The new study suggests a system using biochar, carbonized plant matter made by charring organic material – burning without using air – in a process called pyrolysis. The bioenergy-biochar system, called BEBCS, is stable and lowers sequestration losses when carbon is captured. After the organic matter is turned into carbon-sequestering biochar, it can be placed into the soil as a fertilizer substitute and improve crop production.
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