Interesting North American stats from the McGill online nutrition course I'm taking.
On average, compared to 1970, we eat 11% more food by weight: 18.2lbs up from 16.4lbs.
On top of that, our consumption of grains has increased 42% -- mostly wheat and corn flour.
Perhaps most disturbing is the 59% increase in fat consumption -- mostly cheap cooking oils like canola and soybean.
Could this possibly have something to do with the obesity epidemic? Seems more than likely.