Question

use the words from the right column in the appropriate forms to fill in the gaps.
In (add) to the heavy traffic there were several factories there. Obviously the air-cleaning equipment they used was (effective) or did not work at all.
When i asked my local friend why the people didn't insist on closing the factories he said people had different opinions about the point. Closing the factories was a very (controversy) issue actually. The gas emissions the factories were (response) for had a very negative effect on the environment.

Answer 1

Addition
Ineffective
Controversial
Responsible