Runoffs from an uranium mine stockpile have contaminated the surface water in a location. This might cause health problems among
people in the location. Which of these is the best plan to solve this problem? a-plant trees around uranium mines to absorb contaminants
b-put fences around uranium mines to check the flow of contaminants
c- wear protective clothing for prevention against harmful effects of radiation
d-collect the runoffs in retention ponds for isolation and recovery of contaminants
The correct option is D. Because uranium is a radioactive element, such run off is very dangerous to the people who are living in the environment where the spill occur. The run off must be isolated as soon as possible, by collecting it in a retention pond.
LD50 is a measure of toxicity in animals. A chemical with a smaller LD50 is more toxic and in this question, Shiga toxin has a lower LD50, thus it is more lethal.
