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sineoko [7]
3 years ago
10

What are the factors that determine the level of harm an introduced chemical has on the environment?

Biology
1 answer:
GaryK [48]3 years ago
8 0
<span>1 Chemicals can be toxic because they can harm us when they enter or contact the body. Exposure to a toxic substance such as gasoline can affect your health. Since drinking gasoline can cause burns, vomiting, diarrhea and, in very large amounts, drowsiness or death, it is toxic. Some chemicals are hazardous because of their physical properties: they can explode, burn or react easily with other chemicals. Since gasoline can burn and its vapors can explode, gasoline is also hazardous. A chemical can be toxic, or hazardous, or both.   

</span>2 Non point source<span> water </span>pollution<span> is </span>difficult to control<span> because it comes from the everyday activities of many different people, such as fertilizing a lawn, using a pesticide, or constructing a road or building.</span>
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Answer:

Phase III.

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The phase III of the clinical research includes the double blinded study and its clinical trial on the patients. This phase determines the drug safety and efficacy. The therapeutic effect of the drug is tested directly in phase III of the clinical trial.

Thus, the answer is phase III.

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4 years ago
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sergiy2304 [10]

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3 years ago
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