Obesity is primarily caused by bad eating habits, particularly the excess food which our affluent society is able to afford. The amount of exercise has a minimal effect. Our healthy lifestyle planners have overlooked the fact that the elephant in the room is too much food.
David

Public transport is a disaster for public health. Being jammed into close contact with thousands of people, with almost every disease or ailment known to man, for a long period every day is hardly a recipe for good health. More a plan for the spread of epidemics.

I agree obesity is caused by too much food, rather than bad choices of food. For decades I lived on stake & chocolate biscuits. I was one of the fittest & health trouble free people in the country.

Due to a very active lifestyle I wore out my knees, which combined with a back injury started to give me a lot of pain in my late 60s. Put on a steroid anti-inflammatory drug for this, I constantly felt sick on the stomach & snacked to ease the sick feeling. My weight climbed quite quickly.

A change of medication, & occasional use of some stomach settling stuff overcame this, & stopped the excessive food intake. The weight is now sliding away. What we need is better doctors, not public transport.