The results show that organic farming practices generally have positive impacts on the environment per unit of area, but not necessarily per product unit.
Read it a few more times. It’s exactly what my summary says.
There’s a whole body of work that supports this paper summarizing U.S., Canada, Mexico, etc. You can search for them yourself in in scientific literature searches. This was just one example. There are many more on the topics you want to know.
Long story short, organic production is overall worse for the environment than conventional.
I like this paper because the author’s are completely on point with this
last statement in the abstract:
In order to reduce the environmental impacts of farming in Europe, research efforts and policies should be targeted to developing farming systems that produce high yields with low negative environmental impacts drawing on techniques from both organic and conventional systems.
Now there’s a group of people to grab a pint with, the next time I am in the UK.