1 Subjects: “...virtual learning environment...”

2 Subjects: “...environmental factors...”

3 Subjects: “...smart environments...”

4 Subjects: “...energy and environmental systems...”

5 Subjects: “...economic growth...”

6 Subjects: “...pro-environmental management...”

7 Subjects: “...economics...”

8 Subjects: “...environmental implication...”

9 Subjects: “...economic order quantity (EOQ)...”

10 “... and specificity but fulfil economic, environmental, and rapid point-of-care needs for groups and individuals...”