is this written correctly?

Do you mean..
The people of CCI illustrate the ease OF environmental and financial sense of using resources more wisely.

Also, if you are not beginning a series of things than you do not need a comma.
 
The people of CCI illustrate the ease AND THE environmental and financial sense of using resources more wisely.

I think that makes more sense
 
I would say this,

In an environmental and financial sense, the people of CCI illustrate the ease of using recources more wisely.
 
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