pronoun it vs that

[bosun]

. In the following sentence, can I use ' that' instead of ' it'? If not , why can't I use that?

These days we regard stress as a necessary evil of modern living. Yet stress is not negative and without [B]it [/B]we would not enjoy some of the highpoints in life such as the anticipation before a date .

 

[Rover_KE]

You can use that if you want to, but it's unnecessary to use the demonstrative pronoun when the simple pronoun will suffice.

Rover