What is impersonal tone?

Here is an example of a personal tone in writing:

I think communities should help the homeless more. I envision community housing and jobs programs that would help homeless persons get back on their feet.

The impersonal tone in writing removes 'I' and relies more on what experts say, or what you can say from common sense but without using 'I'.

For example:

According to Harper and Jones (2011), community housing and job programs would help give homeless families a second chance.