Three CERE professors’ comments on a debate article on possible technical solutions as plan B if the price on carbon falls through. “If it is absolutely necessary to use technical solutions, we could for example put up solar panels in order to irrigate Sahara and by doing so, sequestering carbon. It is quicker than building a Fuglesang-Hassler parasol at the Lagrangian point and in all probability considerably cheaper and with by far less negative environmental impact.

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