A chemist is performing a chemical reaction under a few hood. The chemist has a set of beakers, flasks and tubes set up another few hood with various liquids. Being combined inside the glass containers, the fume hood is turned on in order to withdraw any toxic gases and expel them from outside the building, which part of the system is designated as the surrounding.
In this scenario, the surrounding refers to the area outside the fume hood and the building. It is the region where the toxic gases are expelled to ensure the safety of the chemist and other individuals in the vicinity.
