Environmental Impact and Solutions Quiz

What is the primary environmental concern associated with PCBs in the Hudson River?

• They contaminate the food chain.

• They are absorbed by rocks.

• They cause the water to heat up.

• They evaporate into the atmosphere.

Why is taking random sediment samples not the best method for determining fish safety?

• It is too quick and inexpensive.

• It is only effective for small rivers.

• It does not account for toxin accumulation in fish.

• It only measures water temperature.

What makes tiny plants and animals good indicators of contamination levels?

• They are easy to catch and analyze.

• They absorb toxins more slowly than larger fish.

• They live only in clean water.

• They are exposed to more contamination and absorb it quickly.

How do polyethylene samplers help in assessing river contamination?

• They measure the temperature of the water.

• They attract larger fish for analysis.

• They mimic the absorption process of tiny organisms.

• They release toxins into the water.

What is the advantage of using polyethylene samplers over traditional sediment samples?

• They are more expensive but faster.

• They can be used in any type of water body.

• They are cheaper and can be deployed in larger numbers.

• They only measure toxins in the air.