We use the Global Change Analysis Model (GCAM) to understand the role of DACCS across all 5 SSPs for the below 2˚C and below 1.5˚C end-of-century warming goals. We assess DACCS deployment relative to other carbon capture methods, and its side effects for global energy, water, land systems. 

Scenarios for meeting ambitious climate targets rely on large-scale deployment of negative emissions technologies (NETs), including direct air capture (DAC). However, the tradeoffs between food, water and energy created by deploying different NETs are unclear. 

We examine energy, water, and land use tradeoffs from three NETs (afforestation, bioenergy with carbon capture and storage, and direct air capture).

We discuss difficulties of modeling Negative Emissions Technologies to study climate change mitigation strategies, and provide insight into how to better do so.