How is childhood obesity influenced by social class?

I know that lower social classes are more likely to become obese due to lack of exercise, availabilty of quality foods etc but I need more detail as to why higher social classes are less likely to become obese over the lower classes? Referances and facts pleaseee.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).