Answer:
The greatest challenge is how to change human behavior to promote health.
Explanation:
With the invention of new technologies that made our lives easier and simpler, we have become lazier and have changed their diets, replacing healthy food for quick and not nourishing meals. We dedicate more time to other activities where minimal movement is required. These habits have been forming since the last century along with new technologies and the changes in lifestyle. One of the greatest challenges is to change this unhealthy behavior and replace it for healthy habits throughout different plans, campaigns, and education.
Toxic chemicals are mostly found in waste sites where they dump old chemicals and with that, that could cause health problems because they could either dump it into the oceans where the life is or they will burn it causing pollution.
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Gauze , cotton swabs , gloves hope this helps