Not true. Calories are not created equally in terms of environmental impact.
If the food obese people are eating has a large environmental impact, obesity definitely contributes.
That's a pretty big "if" in your statement. I thought HN was better than this.
From my previous HN post:
> Message boards are message boards. You can't take them seriously, including this one.
Are you suggesting the average American got fat off environmentally friendly low-carbon-impact food products? Because I suspect they got fat off Oreos and Coca-Cola.
Those have a lower carbon impact than meat.
Those are vegan products; I'd guess they have relatively low environmental impact aside from their plastic packaging.