The aggregate technical potential for land-based negative emissions technologies (NETs) in the UK is estimated to be 12–49 Mt C eq. per year, representing around 8–32% of current emissions. The proportion of this potential that could be realized is limited by a number of cost, energy and environmental constraints which vary greatly between NETs.
Smith, P., Haszeldine, S. R., & Smith, S. M. (2016). Preliminary assessment of the potential for, and limitations to, terrestrial negative emission technologies in the UK. Environmental Sciences: Processes and Impacts, 18, 1400-1405. https://doi.org/10.1039/C6EM00386A