Taking a step back -- to eating like we're in the 1970s

With obesity running rampant in many western societies, what are we to do? Our lifestyles have become more sedentary, our food has become more filled with things our body doesn't know how to handle and we are not even walking but a few thousands steps a day (many of us).

How about pretending like it is the 1970s? The lack of exercise and the calorie-laden foods kids (and adults) eat these days are apparently enough to offset worse nutritional habits from 30 years ago according to this article. Do you agree?