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