Walking is great exercise! Don't let anyone tell you differently.
As others have said, losing weight tends to be more about the food we consume than the exercise we do.
I don't know where you saw the article that claimed that walking wasn't good enough, but I'd say you can rule them out as a good source of reliable information.
One of the best things you can do for yourself is stop listening to or reading trendy diet advice. Most of the time, they are trying to sell you something (even if it's just your attention to their ads).
Sparkpeople's articles are very good, and while the Tufts "Nutrition Navigator" is sadly no longer being updated, their recommended sites are excellent and I think most still exist: navigator.nutrition.tufts.edu/among_list.h
I usually like to look for information that is associated with a medical group or a university, rather than a fitness magazine or someone trying to sell a weight-loss product.
Ten Red Flags That Signal Bad Nutrition Advice:
Recommendations that promise a quick fix
Dire warnings of dangers from a single product or regimen
Claims that sound too good to be true
Simplistic conclusions drawn from a complex study
Recommendations based on a single study
Dramatic statements that are refuted by reputable scientific organizations
Lists of "good" and "bad" foods
Recommendations made to help sell a product
Recommendations based on studies published without peer review
Recommendations from studies that ignore differences among individuals or groups
Edited by: NATHELESS at: 3/29/2013 (10:13)
My program consists of eating well, getting good exercise and loving life as long and hard as possible.
This is it, your only life.
"Argue for your limitations, and sure enough, they're yours."
| December Minutes: 364