Child obesity makes girls go into puberty earlier

I read a new story that said child obesity can make girls go into puberty earlier. The study said that a girl who gains weight at the age of six can start to develop breasts by the age of nine. Studies have shown that in the last 30 years, girls are reaching puberty earlier, the same time span when child obesity was increased.
If girls begin to develop earlier, then it is just common sense that they will begin to experience sexually at an earlier age, which then could lead to more sexually transmitted diseases, teenage pregnancy and reproductive cancers.
The article does not go into many reasons as to why girls are gaining more weight, but I sure have some thoughts.
First, all the hormones that we put in out food namely daily products that comes from cows. Cows are so full of hormones that it is disgusting. They are shot with them so that they produce more milk, which then produces more cheese and other dairy products. Then we eat those products that the hormoned cow produces. You do not think that has an effect on your body?
I personally do not eat any dairy products that are not 100% natural, if I eat dairy at all. I would strongly suggest that you do the same and stop drinking milk. The only milk that is health for humans is the breast milk that your mother produces. Drink soy milk or at least natural milk.
Second, children eat less healthy overall which makes them fat and if obesity is causing girls to begin puberty early, this could be a major reason of girls developing early. It is common knowledge that children need to stop eating the crap that is out there and start to eat better.
Also, they do not get nearly enough exercise either. I applaud all schools that do not serve unhealthy food and should make children exercise more. It is not just the schools responsibility, but the parents as well. I know that the majority of parents are either single or most homes have two parents working full-time, which leaves left time for them to cook healthier for their children. However, they still do need to try and make an attempt to do so, for the health of their child.