“…Figure 7. Localisation of study and earth-based material technique production around the world: Afghanistan [29], Algeria[48,77,83], Argentina[21], Benin[68], Brazil[78], Bulgaria[49], Burkina Faso[23,27,74,84], Cameroon[22,28,71], Canada[85], China[34,[86][87][88][89][90], Cyprus[61], Egypt[10], Estonia[82], France[26,27,31,37-40,50,52,54,55,64,67,76,91-95] [31,41,42,44,47,63,81], Iran[30,32,96], Italy[35,56,58], Mexico[80], Morocco[45,57,65,66,69,70,[97][98][99][100], Nigeria[101], Peru[53], Poland[62], Portugal[75], Senegal[18,72,73]<...…”