Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S.K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA; https://www.ipcc.ch/pdf/assessment-report/ar5/wgl/WGlAR5_Chapterl3_FINAL.pdf. Plant photosynthesis is unable to compensate for such a huge C02 overload, resulting in a considerable increase in C02 levels in the atmosphere and a heightened greenhouse effect.