NaimExplain

Describe the aim of the Stockholm Convention. Answer:A treaty, to address toxic chemicals that persist in the environment, bioaccumulate in the food chain, and have the ability to travel long distances

Compare and contrast the safety approach of the U.S. as opposed to the European nations. Answer:Europe: products are tested extensively in an effort to bring only safe substances to market. This approach helps to minimize potentially harmful products from being brought to market, but it takes time and it may delay some perfectly safe products from being utilized. US: "innocent until proven guilty" approach, allows products to be introduced to the market with limited testing and then recalls substances if potentially harmful substances are found to be unsafe after additional testing is conducted.

Distinguish between risk assessment and risk management. Answer:Risk assessment is a process by which risk is quantified and compared in an effort to identify potential problems. Risk assessment, when applied to the field of environmental health helps to determine if a substance or activity might pose a health threat to people or wildlife.

Define the term "risk" as applied to hazard exposure. Answer:Defined as the mathematical probability that an action or substance will result in harm.

Explain the concept of "synergistic effects" when considering mixes of chemicals. Answer:Chemical substances introduced simultaneously can sometimes cancel out each other's effects, sum each other's affects, or multiply each other's effects

Distinguish between "acute exposure" and "chronic exposure." Answer: Acute exposure : exposure is a high exposure over a short period. Chronic exposure : low exposure over a long period.

Distinguish between an "LD50," an ED50," and a threshold dose. Answer: LD50 : scientists calculate the amount of toxicant it took to kill half of the animals tested. ED50 : defined as the amount of a chemical it takes for 50% of the test population to be affected in an adverse way.