Why is Obesity on Increase

Obesity seems to be on the increase because there is more avaliability of fast food which is uusally cheaper than the more healthier options particular on the high street with shops such as Asda, Tescos and Iceland which usually have cheaper products their comeptitors Marks and Spencer and Waitrose who are seen as more upmarket and expensive place to shop. And most likely to someone who dosen't have alot of money to spend on food shopping their likely to go somewhere like iceland whose food stuff is mainly cheap processesd frozen food thats not nesscarily going to have any good nutrional value to them. Other food places such as burger and chicken joints tend to be found in the more deprived areas which could actually be a big factor that is the main cause behind obesity in those particular areas .