The criticism mainly focused on the conceptual use of untested methods of CDR to keep global warming below 2C above pre-industrial levels in model simulations, the potential risks of deploying CDR technologies at scale, and the role of science in climate policy negotiations. (carbonbrief.org)
Nevertheless, they remain largely untested in humans. (journals.plos.org)
Although GR has been accurately tested in weak gravitational fields, it remains largely untested in the general strong field cases. (blackholecam.org)