[Doji]

I agree we should not ignore detrimental environmental effects. However we should strive for a nuanced view which attempts to determine root causes.

The root cause of artificial fertilizers is fossil fuels.

The root cause of feedlot runoff is... feedlots? I'm not sure if there's something more fundamental at play here. I'd like to see a fundamental analysis of this.

Cattle feed is generally not human edible, that's the beauty of ruminant animals. Even conventionally raised cattle usually grow up on grass, only to be finished on grain. Granted as cattle are slaughtered at younger and younger ages, the grain finishing portion is consuming a larger percentage of their overall lifetime feed stuff. But even so the grain they're eating wasn't going to just end up on your dinner plate. They eat the husk and all. And besides this is only bad insofar as growing food in general is bad, so that's the root cause.

You missed deforestation, which we discussed elsewhere in the comments. I recommend to check it out.