Correlation is not causation.
That article notes correlation but provides zero evidence of causation.
Yes we know there are more obese people in the developed west than there are in Asia, there are also more cars per capita, flights pre capita, more home heating per capita.
More energy used per capita in the west and more obese people per capita in the west.
There are also more bald men per capita in the west, perhaps baldness in men is the cause of global warming.