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?

What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above select the best answer from the choices provided a b c d