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A(n)index can be created based on more than one column._________________________
Polio Vaccine
A vaccine used to prevent poliomyelitis, a viral disease that can cause paralysis and death.
Society
A complex structure of individuals and groups interacting under a shared cultural, economic, and political system.
Leaded Gasoline
Gasoline that contains lead compounds as additives, historically used to improve engine performance but now largely banned due to environmental and health concerns.
Environmental Pollution
The contamination of the physical and biological components of the earth/atmosphere system to such an extent that normal environmental processes are adversely affected.
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