News for hackers. Stuff that matters.

A comment on 25% of Cars Cause 90% of Automobile Air Pollution.

Re:25% of Cars Cause 90% of Automobile Air Pollution by headShrinker on Thursday May 07, 2015 @10:53AM (#9505458)
It should be "Gallons per mile" not "Miles per Gallon"

I read this article a few years ago, and following article illustrates the point very well.

http://www.mpgillusion.com/p/what-is-mpg-illusion.html

[ Parent | on HN ]
Re:25% of Cars Cause 90% of Automobile Air Pollution by mizzao on Thursday May 07, 2015 @11:31AM (#9505778)
Combining MPG numbers is what the harmonic mean is for :)
[ Parent | on HN ]
Re:25% of Cars Cause 90% of Automobile Air Pollution by colanderman on Thursday May 07, 2015 @11:46PM (#9509862)
Thank you, I've been looking for a name for that function for years.
[ Parent | on HN ]