Interesting. I have always thought that fat came from eating food that was surplus to the body's immediate energy requirements. In other words, from eating more than was needed.
Are you saying that fat is produced by photosynthesis? Or some other mechanism than simple eating?
If not, then surely a life-style change involving less eating WOULD result in weight reduction.
Being one of those lucky people who doesn't have to bother how much he eats, I am nonetheless aware that eating only what you need is not so easy. But it is doable, and I don't think it helps over-weight people to pretend that there is nothing that they can do about it.
Nor does it help tax-payers, who have to fund the consequences of obesity.
Personally, I am in favour of a massive sugar tax. Not to mention a high minimum price for alcohol sold in supermarkets (which I have to say will hit me hard!).