I see things getting worse not better and the culprits are obvious, but may do not care.
overeating in general at all meals but but specically of junk food, processed food, fried foods, juices and sodas etc.
ignorance about how to eat health and being to lazy to prepare own meals, read contents of foode etc.
snacking way to much on junk food, crackers and chips
complete lack of daily exercise - sitting at desk all day followed by sitting infront of a TV consuming calories.
kids raised eating way too much fast food, sodas, juice, gatorade, candy etc and basically having addictions to this crap.
I also think people just do not give two hoots that they are overweight and see plenty of peers who are same.
It is literally revolting to go to a place like a zoo, mall, seaworld etc and see the obesity in families and what they eat that day.
All you can do is educate your own families and set good examples.