[quote kikisparks]@MangyInseam well nearly every chicken and pig in the U.K. is being raised in a factory type way:
www.wwf.org.uk/sites/default/files/2017-10/WWF_AppetiteForDestruction_Summary_Report_SignOff.pdf
“Today, protein-rich soy is such an important feed ingredient that the average European consumes approximately 61kg of soy per year, largely indirectly through the animal products that they eat like chicken, pork, salmon, cheese, milk and eggs. In 2010, the British livestock industry needed an area the size of Yorkshire to produce the soy used in feed. And if the global demand for animal products grows as anticipated, it’s estimated that soy production would need to increase by nearly 80% to feed all the animals destined for our plates.”
But food that comes from the bodies of grass fed animals is not the environmental answer either:
www.tabledebates.org/node/12335
This report finds that better management of grass-fed livestock, while worthwhile in and of itself, does not offer a significant solution to climate change as only under very specific conditions can they help sequester carbon. This sequestering of carbon is even then small, time-limited, reversible and substantially outweighed by the greenhouse gas emissions these grazing animals generate. The report concludes that although there can be other benefits to grazing livestock - solving climate change isn’t one of them.
www.google.co.uk/amp/s/amp.independent.ie/business/farming/forestry-enviro/blow-for-grass-fed-beef-as-new-report-suggests-its-part-of-the-climate-problem-not-solution-36209259.html
But at an aggregate level the emissions generated by these grazing systems still outweigh the removals and even assuming improvements in productivity, they simply cannot supply us with all the animal protein we currently eat. They are even less able to provide us with the quantities of meat and milk that our growing and increasingly more affluent population apparently wants to consume. Significant expansion in overall numbers would cause catastrophic land use change and other environmental damage. This is especially the case if one adopts a very ‘pure’ definition of a grazing system, the sort that grazing advocates tend to portray, where livestock are reared year-round on grass that is not fertilised with mineral fertilisers, receiving no additional nutritional supplementation, and at stocking densities that support environmental goals.
link.springer.com/article/10.1007/s10584-020-02673-x
“Grazing systems emit greenhouse gases, which can, under specific agro-ecological conditions, be partly or entirely offset by soil carbon sequestration. However, any sequestration is time-limited, reversible, and at a global level outweighed by emissions from grazing systems. Thus, grazing systems are globally a net contributor to climate change.”[/quote]
Why would you think eating as much animal product as we do now is ok? No one has suggested that. We know that's not a really a sustainable goal in most climates.
And for that matter if we are assuming people to continue to farm as they do now, eating a vegan diet is also very non-sustainable, barely better than the standard western diet. So you haven't offered an answer.
This is exactly the problem with these kinds of analysis. They basically say, this is shit, and then tell us that we should do this other thing which is also shit.
There is no agriculture that is completely without consequence. How could there be? But the idea is as close to a closed system as possible and that is not a plant only system.