42 Research and development in the field of wastewater streams and the mining, recovery of minerals and metals to be used for battery, transportation, cosmetics, agriculture, food, chemicals, steel and concrete industries; Scientific research and development; Scientific research consulting in the field of battery, transportation, cosmetics, agriculture, food, chemicals, steel and concrete industries; Scientific research consulting in the field of mining, extraction and recovery of minerals and metals from wastewater streams; Scientific study and research in the field(s) of mining, extraction and recovery of minerals and metals from wastewater streams