"they" refer to what?
Smaller quantities (of herbicides) are used in forestry, pasture systems, and management of areas in which "they" are set aside as wildlife habitat.
in the above sentence, Which noun do "they" refer to?
what is the meaning of " in which "they" are set aside as wildlife habitat."
and is it correct to say and rephrase it like this:
Smaller quantities are used in forestry, pasture systems, and management of areas set aside wildlife habitat.
?
and why is it correct or nor?
thank you.