Over the last 2 years, lead and copper levels within Flint, Michigan's water supply have significantly dropped. Why is it still important to public health to continue monitoring the lead and copper levels despite this drop?

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.