Environmentally friendly my ass. Any minor damage and the car will be toast because the insurance company will total it. Even if it gets back on the road it'll have a salvage title, something that's poison to a car and ensures that it ends up either crushed or parted out. These are already problems with unibody cars thanks to how quickly insurance adjusters will take any deformation of the core unibody, even just cosmetic damage like the C-pillar having a dent, and call the car a total loss.

There are more than a few A-body Oldsmobile Cutlass Cieras and Buick Centuries from the late 1980s that I still see driven around where I live. The environmental impact they've had has been far less than any of these cast-body cars will be because an A-body is a cockroach that will never die no matter how many times you hit something with it. They were produced decades ago and have long since offset their initial production impact. Add in all the Chevrolet C-10s, Chevrolet S-10s, Ford Rangers, Suzuki Sidekicks/Geo Trackers, and XJ Jeep Cherokees I see daily and they still have less of an impact environmentally than these disposable cars will have because they can be repaired instead of requiring total replacement.