Maccas and people sitting on computers having arguments on the internet all day is why people are fat.
If the shops are a 30min walk away. Its a 1hour walk back with your trolly. By the time you get home in the 40* heat, your milk is off, your eggs are cooked, and your ice-cream has melted. Then you still need to walk another hour to take the empty trolly back. LOL and wtf do you do when you want to buy something big like a plasma telly, or a bbq?