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. 2021 Aug 11;12:691651. doi: 10.3389/fpls.2021.691651

FIGURE 1.

FIGURE 1

Exploration and application of controlled environment agriculture (CEA) systems worldwide. The figure compiled information based on the following references: Boari et al. (2008), Hong et al. (2014), Eigenbrod and Gruda (2015), Tuzel and Oztekin (2016), Ghosh et al. (2018), Lakhiar et al. (2018), Farhangi et al. (2020), Hemming et al. (2020).