The article didn't surprise me to be honest, I'm definitely noticing people are getting larger and larger.
Part of the problem I think, as others have mentioned, is the easy availability of super processed food and easy meals, just take a walk through your local supermarket and the amount of processed foods is staggering, a lot of which doesn't require much effort to prepare if any.
We are also living in a society where a lot of families work full time, then have the commute back and forth, then by the time they get home and settled they might find it too tiresome to cook something, whereas the lure of a microwaveable meal will take minutes to cook.
That said, even if you cook from scratch its not that simple.
Start of the year I decided to lose weight as I was 81kg and as a person quite short my BMI was falling into the obese range, however I couldn't figure out why I was getting larger when I was cooking all meals from scratch and didn't snack on crisps etc.
When I started to actually look at the amount of calories and what I was eating it became apparent that I was simply eating too much and too often eating foods with lots of carbs and cheese (I blame the wife for getting me a pizza oven!)
.
So, I spent some time learning about nutrition (NHS has some great advice on
reading labels/nutritional information), learnt more detail about calories (now have a spreadsheet on the fridge listing calories per 100g) and adjusted how I shop and what I put on my plate.
In short, I've cut carbs significantly, eat more salad and veg, walk more and aim for 1700 calories a day.
As a result I've lost 6kgs already and thats without going to the gym!
I no longer snore, I sleep better, I have more energy and my mood has improved too.
I always thought I led a healthy lifestyle but its really opened my eyes to what eating healthy/being healthy means.