In the u. s., the epa has established maximum contaminant levels for in drinking water.

In multiple sclerosis, the immune system destroys the substance that coats and protects nerve fibers in the brain and spinal cord. this causes inflammation and injury to the nerves, and the axons don't conduct impulses as well.

The future for teen moms can be compromised due to the demands of parenting.

Lifestyle diseases are caused by a combination of