In Los Angeles, the smog is very bad for health. Not just humans are affected by smog inhalation, but also animals/wildlife. Animals are affected by the reduced visibility which is very sad. 

I think we eat more meat due to our fast food culture, where it is easier and cheaper to buy a burger for a dollar from McDonald's than to get a salad. The farming industries need to create incentives for plant-based farming so that meat farming is not so emphasized.