Suggest how air polluctants
could be reduced.​

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

well this isn't a question but if you are asking if it is true or false it is, true.

answer; one person; monarch;