impurities

"The condition for getting a raise at work is meeting your quarterly targets. "

"The noisy construction outside the church was a pollution of the peaceful atmosphere, distracting everyone from the service. "

"The contamination of the water supply caused many people to get sick. "

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The extraction of the wisdom teeth was a necessary procedure for the student. "

"My sister is very helpful, especially when it comes to organizing things. "

"The politician's affair with a staff member was seen as a serious act of immorality. "

"Insufficient time is available to reflect on the problem"

"A CPU is a component of a computer."

"The purification process for the drinking water at the school ensures everyone has clean, safe water to drink. "

"The teacher epitomised the long chapter into a one-page summary for the students. "

"The adulteration of the olive oil with cheaper vegetable oil made it taste bland and less healthy. "