Just as a counterpoint, the area burning man is held in is one of the most ecologically inert places you could go. There’s no vegetation and the only life to speak of is brine shrimp eggs, which are about as threatened as mosquito larvae.
There’s still a lot of trash that gets left behind which can travel with wind, but as far as impact on the land goes, it’s likely significantly less invasive than your local county fair. There’s just nothing out there for them to damage.
There needs to be a lot more studies on obesity and why it’s gone up so much. I don’t buy the “more sedentary lifestyle” argument. Our mobility hasn’t changed THAT much in the last 50 years, at least not enough to explain the absolutely skyrocketing cases of obesity.
There’s a big link between poverty and obesity. People in poverty tend to be more active due to more physically demanding jobs, so it feels like the cause has to be from cheap food. While a lot of people might immediately look to high fructose corn syrup, I’m not sure it’s that simple. Obesity rates are rising even in places that don’t use HFCS in everything. I wouldn’t be surprised if there was some additive or preservative that started to get heavily used in the last few decades that’s had horrible, unintended consequences.