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While efforts to reduce GHG emissions should always take priority, meeting climate goals will also require carbon dioxide removal (CDR) — systems that remove carbon directly from the air — likely at the billion-tonne scale by midcentury. The precise amount needed will depend on how fast the world curbs emissions. Carbon removal can take numerous forms, including natural and technological solutions that accelerate current carbon dioxide removal rates. Direct air capture (DAC) is gaining traction as a promising carbon removal approach that will likely be a necessary part of a larger carbo...

Meeting net-zero climate goals will require a portfolio of carbon removal approaches — including direct air capture plants like this one in Switzerland — to remove excess CO2 from the air. Photo by Julia Dunlop/Climeworks As global carbon emissions continue to rise, the effects of climate change are increasingly felt through more severe storms, wildfires and flooding. The need to reduce greenhouse gas (GHG) emissions — such as through investing in energy efficiency, deploying solar panels and reducing deforestation, among others — is critical. At the same time, the latest climate scie...