Figure 1.

(a) Photographs of mint plants grown on natural soil and 250 mg kg^–1 Pb²⁺ perovskite-contaminated soil. The table on the right gives the measured Pb²⁺ content in the corresponding position. Reproduced with permission from ref (5). Copyright 2020 The Author(s), published by Springer Nature under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). (b) Metal (Pb/Sn) uptake ability as a function of amount of metal added. The data are extracted from ref (5). (c) Environmental impact indicators of single-junction solar cells using different semiconductors, normalized by related parameters of Si cells. The data are taken from ref (18).