00:01
It is asked that select all the correct responses about pcbs.
00:05
So pcbs have leaked into soil and water.
00:09
So this is a correct response so you can say that pcbs have been found to contaminated soil and water due to their improper disposal and leakage from electrical equipment.
01:16
Right, so you can say that first option is correct.
01:20
Now if you talk about pcbs are rapidly biodegraded.
01:25
So this is an incorrect response because pcbs are known as their as their persistence in the environment and are not easily biodegradable.
01:36
That is why it is found in contaminated soil, right? so they persist they can persist for many years and accumulate in food chain, right? so it is incorrect choice.
01:50
So first one is correct and thirdly we have pcbs are still used in industry.
01:55
So this is also incorrect response because pcbs were widely used in industry in the past particularly as insulating fluid and electrical equipment.
02:12
However, their production and use have been banned or severely restricted in many countries due to their harmful effects on human health and environment...