What does it Mean?

Czy powinna być kropka po wyrazie "oil" i jak przetłumaczyć "in that firstly..." ?
Thanks for help!

Here's the sentence: " From the pojnt of view of recycling, paper has two advantages over minerals and oil IN THAT FIRSTLY IT COMES FROM A SUSTAINABLE RESOURCE AND SECONDLY it is less threating..."

postaw po 'oil' kropkę i zrób z tego dwa zdania:

oil. Firstly it......

in that firstly = pod tym względem, że po pierwsze

kropka, myślę, niepotrzebna.