1) Why are people concerned about heavy metals in the river? 2) How did this spill occur?
3) What do people expect from the EPA?

ans1 )Amongst the pollutants pesticides, heavy metals, and detergents are the major cause of concern for aquatic environment because of their toxicity, persistency and tendency to accumulate in organisms.

ans2 )Oil spills into rivers, bays, and the ocean most often are caused by accidents involving tankers, barges, pipelines, refineries, drilling rigs, and storage facilities. Spills can be caused by: people making mistakes or being careless. equipment breaking down.

ans3 ) The Environmental Protection Agency is a United States federal government agency whose mission is to protect human and environmental health. ... It oversees programs to promote energy efficiency, environmental stewardship, sustainable growth, air and water quality, and pollution prevention.

Explanation:

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chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

the answer is b. glad to .